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 (PDF, 8.59MB)

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

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

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

- CorpPass Simplified Guide for Companies (PDF, 615KB)

  • For Tax Agents

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

- FAQs on CorpPass for Tax Agents (PDF, 464KB)

  • For Foreign Entities

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

Login/ e-Filing Issues Encountered at myTax Portal 

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

Corporate Tax

Name of e-Service Description Information Needed Estimated Submission and/ or Processing Time Guides/ FAQs
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) 
N.A. 

FAQs (PDF, 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)
N.A. 

FAQs (PDF, 1.01MB) 

Apply for Certificate of Residence (COR)

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

  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 (PDF, 492KB)

    Apply for Payment Plan This e-Service is mobile-optimised

    For companies to re-activate their previous GIRO arrangement for Corporate Tax.
    1. Your CorpPass ID and password 

    2. Your company’s tax reference number

    Submission 

    5 minutes

    Processing

    Your GIRO arrangement will be set up within 3 working days.

    User Guide (PDF, 732KB)
    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 now available to companies and 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 (PDF, 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 2020 is now available.)  

        For qualifying companies to e-File Form C-S1.  

        1 If your company is dormant (i.e. did not carry on business and had no income in the preceding year), please e-File your company’s Income Tax Return using the ‘File Form C-S/ C for Dormant Company” e-Service.

        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 (PDF, 866KB)

        File Form C

        - Online Form C  

        - Form C (Upload)

        (These e-Services for YA 2020 are now available.)

        For companies to e-File Form C.

          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 (PDF, 1.25MB)  

          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: