Companies/ Tax Agents


From 1 Sep 2018, CorpPass is the only login method for online corporate transactions with the Government. You must first be authorised to access IRAS' digital e-Services via CorpPass before you can log in to myTax Portal. For assistance on CorpPass setup, please refer to the following for guidance:

  • For Companies

- CorpPass Step-by-Step Guide for Companies (8.59MB)

- Frequently Asked Questions (FAQs) on CorpPass for Companies (297KB)

- Guide on How to Log In to myTax Portal Using CorpPass (973KB)

Applicable to a company director who is e-Filing for the company

- CorpPass Simplified Guide for Companies (615KB)

  • For Tax Agents

- CorpPass Step-by-Step Guide for Tax Agents (9.62MB)

- FAQs on CorpPass for Tax Agents (464KB)

  • For Foreign Entities

- CorpPass Step-by-Step Guide for Foreign Entities (9.96MB)

Login/ e-Filing Issues Encountered at myTax Portal 

Please click HERE (193KB) for a list of common login/ e-Filing issues encountered at myTax Portal.

Name of e-Service Description Information Needed Estimated Submission and/ or Processing Time Guides/ FAQs
 Corporate Tax        
Access Company Dashboard   A dashboard that provides companies or their tax agents with information such as company's corporate profile, filing and assessment status, latest notice of assessment and whether the company is on GIRO.
  1. Your CorpPass ID and password
  2. Your company's tax reference number (e.g. 200312345A or 52912345A) 
N.A. 

FAQs (1.01MB)

Access Tax Agent e-Services

A one-stop platform that allows authorised tax agents to:

  • Have an overview of their clients' corporate tax matters;
  • Perform transactions on behalf of clients; and
  • View latest correspondences/ notices issued.
  1. Your CorpPass ID and password
  2. Your tax agent firm's tax reference number (e.g. 200312345A or 52912345A)
N.A. 

FAQs (1.01MB) 

Apply for Certificate of Residence (COR)  

For companies or their tax agents to apply for COR via myTax Portal.

From Jun 2017, all COR applications have to be e-Filed via myTax Portal. Except for specific circumstances, paper applications will no longer be accepted.

  1. Your CorpPass ID and password
  2. Your company's tax reference number
  3. Information pertaining to the income derived from the treaty country

Submission

5 minutes

Processing

The application will be processed within 7 working days.

User Guides for: 

FAQs (492KB)

    Apply for Waiver to Submit Tax Return (Dormant Company) 
    • For dormant companies to apply for a waiver of Income Tax Return submission.
    • For companies applying for strike off with ACRA if they need to e-File Income Tax Returns for advance* Years of Assessment (YAs) up to the date of business cessation.

      *Advance YAs refer to YAs where the e-Filing service is not yet available via myTax Portal.  

    This e-Service is currently available to companies only and not tax agents.

    1. Your CorpPass ID and password
    2. Your company's tax reference number
    3. Information relating to the cessation of business

    Submission

    10 minutes

    Processing

    The company will be notified of the status of its application by post at its registered address.

    The application will be processed within 2 months.

    The processing time may take longer if the case is complex.

    User Guides for:

    FAQs (480KB)   

      File Estimated Chargeable Income (ECI)  

      For companies to furnish an estimate of their ECI within three months from the end of their financial year end, unless the concession on waiver to file NIL ECI applies.

      This convenient filing option is also available to tax agents who wish to perform single or multiple e-Filing transactions for their clients.

      1. Your CorpPass ID and password
      2. Your company's tax reference number
      3. Your company's revenue and ECI

      Submission

      5 minutes

      Processing

      The processing is up to 7 working days. If there is tax to be paid on the ECI filed, the Notice of Assessment will be sent to the company's registered address.

      User Guides for:

      FAQs

        File Form C-S

        (This e-Service for YA 2019 is now available.)  



        For qualifying companies to e-File Form C-S1 and enjoy these benefits: 

        • Auto-computation of certain fields that minimise filing errors
        • Get your estimated tax payable on-the-spot
        • Pre-filling of company's unutilised items (trade losses, capital allowances and donations) from the immediate preceding YA and current year approved donations, where applicable. The pre-filled amounts are for reference, and companies can declare different amounts in the relevant Boxes under "Company's Declaration" if they differ from your records (except for current year donations)
        • iHelp for step-by-step guidance
        • Extra 15 days to e-File

        Find out more about the Benefits of e-Filing Form C-S

        1 e-File your company's Income Tax Return via the e-Service " File Form C-S/ C (Dormant Company)" if it is dormant (i.e. did not carry on business and had no income in the preceding year).  

        1. Your CorpPass ID and password  
        2. Your company's tax reference number
        3. Your financial statements and tax computation

        Note: You may use the Basic Corporate Tax Calculator to help you prepare your tax computation. 

        Submission

        10 minutes

        Processing

        We process returns in batches. Most companies should receive their Notice of Assessment by 31 May of the following year. 

        Tips on e-Filing Form C-S

        User Guides for:

        FAQs (798KB)

        File Form C

        - Online Form C  

        - Form C (Upload)

        (These e-Services for YA 2019 are now available.)


        For companies to e-File Form C and enjoy the benefits below:

        • Auto-computation of certain fields that minimise filing errors
        • Get your estimated tax payable on-the-spot
        • Pre-filling of company's unutilised items (trade losses, capital allowances and donations) from the immediate preceding YA and current year approved donations, where applicable. The pre-filled amounts are for reference, and companies can declare different amounts in the relevant Boxes under "Company's Declaration" if they differ from your records (except for current year donations)
        • iHelp for step-by-step guidance
        • Extra 15 days to e-File   
        1. Your CorpPass ID and password 
        2. Your company's tax reference number 
        3. Your financial statements, tax computation and supporting documents in PDF format (Maximum file size is 4MB)
        4. Declaration for the Purpose of Claiming WDA for IPR (Section 19B) and R&D Claim Form in PDF format (Maximum file size is 2MB)

        Note: You may use the Basic Corporate Tax Calculator to help you prepare your tax computation. 

        Submission

        30 to 40 minutes

        Processing

        We process returns in batches. Most companies should receive their Notice of Assessment by 31 May of the following year.

        Tips on e-Filing Form C

        User Guides for Online Form C:

        User Guides for Form C (Upload):

        FAQs (1.15MB) 

        File Form C-S/ C for Dormant Company

        For dormant companies or their tax agents to e-File the Income Tax Return (Form C-S/ C).

        Company’s unutilised items (trade losses and donations) from the immediate preceding YA will be pre-filled if available. The pre-filled amounts are for reference, and companies can declare different amounts in the relevant Boxes under “Company’s Declaration” if they differ from your records.  

        1. Your CorpPass ID and password  
        2. Your company's tax reference number
        3. Your company’s unutilised losses and donations to be carried forward, if any
         

        Submission

        5 minutes

        Processing

        The processing is up to 7 working days. 

        Tips on e-Filing for Dormant Company

        User Guides for:

        FAQs (681KB)

        Pay Taxes This e-Service is mobile-optimised




        For companies to settle their tax bills or generate a Payment Slip No. to make payment via Internet Banking.
        1. Your CorpPass ID and password  
        2. Your company's tax reference number
        3. Your Internet Banking login details (e.g. password, token) 

        Processing

        We will update your account within 3 working days once payment is received. 

        User Guide (137KB)
        Request Penalty Waiver/ Extension of Time to File For companies to appeal for waiver of late filing fees, late payment penalties and request for extension of time to file corporate tax returns and/or accounts upon receiving late filing notification. 
        1. Your organisation's tax reference number, CorpPass ID and CorpPass Password (login via Business Tax with CorpPass)
        2. The tax agent firm's tax reference number, CorpPass ID and CorpPass Password (login via Tax Agent Login > Business Client with CorpPass) 

        Submission

        3-5 minutes

        Processing

        The result will be displayed immediately. However, there will be requests that require review and we will contact you within 3 working days. 
        User Guide (4.58 MB)
        Research & Development (R&D) Allowance Account

        For companies to:

        • Declare the Base Year and Base Expenditure under the R&D Tax Allowance Scheme; and
        • View your R&D Account.
        1. Your CorpPass ID and password  
        2. Your company's tax reference number
        3. Base Year and Base R&D Expenditure under the R&D Tax Allowance Scheme

        Submission

        5 minutes

        Processing

        N.A

        User Guides for:

        FAQs (372KB)

          Revise/ Object to Assessment For companies or their tax agents to lodge an objection to the Notice of Assessment or make amendments to the ECI and/ or Form C-S/ C filed.
          1. Your CorpPass ID and password  
          2. Your company's tax reference number
          3. Details of the objection and document files (to be attached to the objection, if any) in PDF format. Maximum file size is 2MB.

          Submission

          5 minutes

          Processing

          For objection/ revision to ECI and revision to Form C-S/ C, we will respond to you within 2 months.

          For objection to Notice of Assessment issued after IRAS has reviewed the tax return (i.e. Form C-S/ C), we will inform you of our decision within 6 months. For complex cases where more time is needed to review the tax issue under objection, we will inform you the estimated time needed.

          User Guides for:

          FAQs (583KB)

            Submit Document
            • For companies filing Form C to submit their financial statements, tax computation and supporting documents relating to filing of Form C
            • For companies filing Form C to submit their Form for Reporting of Related Party Transactions
            • For companies filing Form C-S to submit their S19B Declaration Form
            1. Your CorpPass ID and password 
            2. Your company's tax reference number
            3. Your financial statements, tax computation and supporting documents in PDF format (Maximum file size is 4MB)
            4. Form for Reporting of Related Party Transactions (Maximum file size is 4MB)
            5. Declaration for the Purpose of Claiming WDA for IPR (Section 19B) and R&D Claim Form in PDF format (Maximum file size is 2MB)  

            Submission

            5 minutes

            Processing

            We will update the status within 3 working days once document is received.
            User Guides for:
            Update Corporate Profile/ Contact Details This e-Service is mobile-optimised For companies or their tax agents to view the companies’ particulars and contact details (e.g. company's status, registered office address, financial year end, telephone number).


            Contact details (e.g. name of contact person, telephone number, email address) and financial year end can also be updated by the company’s staff or their tax agents who have been authorised with an ‘Approver’ role.

            1. Your CorpPass ID and password  
            2. Your company's tax reference number
            3. Your company's registered address and contact information if update is to be done

            Note: Update of address is available only for foreign companies not registered with the Accounting and Corporate Regulatory Authority (ACRA).

            Submission

            N.A

            Processing

            The contact details and financial year end (other than address) will be updated immediately upon successful submission. You can view the updated contact details online.

            For address update, you can expect the request to be processed within 3 working days.

            User Guides for: 

            FAQs (476KB)

            View Account Summary This e-Service is mobile-optimised 
            For companies to view their statement of account (e.g. to check payment status and if there is any outstanding corporate income tax payable). 
            1. Your CorpPass ID and password  
            2. Your company's tax reference number
            N.A    User Guide (112KB)
            View Corporate Tax Filing Status This e-Service is mobile-optimised

            For companies to view the submission and processing status of their ECI and/ or Form C-S/ C filed and the progress of Forms submitted.

            1. Your CorpPass ID and password  
            2. Your company's tax reference number
            3. Relevant year of assessment for which you would like to view return status on

            Submission

            N.A

            Processing

            Retrieval is immediate.

            User Guides for:

            FAQs (225KB)

              View Corporate Tax Notices This e-Service is mobile-optimised   

              For companies to view the following types of correspondence and notices issued by IRAS:

              • Notice of Assessment
              • Letters (e.g. Certificate of Residence)
              • Acknowledgement pages from e-Filing.
              1. Your CorpPass ID and password  
              2. Your company's tax reference number
              N.A

              User Guides for:

              FAQs (389KB)

                View Document Identification Number (DIN)

                For companies or their tax agents to search for DIN.

                Companies which download a paper Form C-S/ C from our website or via tax agent's software will need to quote the DIN on Form C-S/ C.

                You do not need to log in to myTax Portal to use this e-Service.

                1. Your company's tax reference number
                N.A

                User Guide (218KB)

                FAQs (298KB)  

                  View Donations For companies to view the donations made to approved Institutions of a Public Character (IPCs).
                  1.  Your CorpPass ID and password  
                  2. Your company's tax reference number
                  N.A 

                  User Guides for:

                  View Officer-in-charge

                  For companies to view the name and contact number of the officer-in-charge.

                  You do not need to log in to myTax Portal to use this e-Service.

                  1. Your company's tax reference number
                  N.A
                  View Payment Plan  This e-Service is mobile-optimised 
                  For companies to view their tax payment plan details (e.g. GIRO instalment plan). 
                  1. Your CorpPass ID and password  
                  2. Your company's tax reference number
                   N.A User Guide (126KB)
                   Others        
                  Apply for PIC Cash Payout For companies or their tax agents to apply for PIC cash payout via myTax Portal.
                  1. Your CorpPass ID and password
                  2. Your company's tax reference number
                  3. Your company's revenue
                  4. Information pertaining to costs incurred on qualifying activities


                  Note: If you are claiming costs incurred on PIC IT and Automation Equipment acquired on hire purchase and/ or Research and Development costs, please complete the Hire Purchase Template and/ or Research and Development Claim Form, and submit them together with your application.

                  Submission

                  10 minutes 

                  Processing

                  Most applications will be processed within three months

                  User Guides for:

                  FAQs (820KB)

                  View PIC Cash Payout Application Status For companies or their tax agents to check the status of their PIC cash payout applications via myTax Portal


                  The PIC cash payout application status will be available for viewing within three days from the date of submission of your PIC Cash Payout application.

                  1. Your CorpPass ID and password
                  2. Your company's tax reference number
                  N.A 

                  User Guides for:

                  FAQs (363KB)

                   
                  View PIC Scheme Notices This e-Service is mobile-optimised  For companies or their tax agents to view PIC cash payout correspondence and notices via myTax Portal.
                  1. Your CorpPass ID and password
                  2. Your company's tax reference number
                  N.A  User Guides for: 

                  FAQs (357KB)