Singapore Corporate Access (or Corppass) is the sole authorisation system for entities to manage digital service access of employees who need to perform corporate transactions with government agencies online. To access IRAS digital services, you must first be authorised via Corppass.

From 11 Apr 2021, you are required to log in to government digital services for businesses (G2B) using Singpass instead of Corppass. For more information, visit Corppass' website.

For Companies

 

For Tax Agents

 

For Foreign Entities

 

Login/ e-Filing Issues Encountered at myTax Portal 

Browse our most commonly encountered Corppass login/ e-Filing issues for Corporate Income Tax (PDF, 102KB).

Still can’t find the answers you are looking for? Try searching under the myTax Portal Technical FAQ instead!

Corporate Income Tax 

Name of Digital ServiceDescriptionInformation NeededEstimated Submission and/or Processing TimeGuides/ FAQs
Access Company DashboardFor companies or tax agents to view a dashboard 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 Singpass
  2. Your company's Unique Entity Number (UEN)/ Entity ID (e.g. 200312345A) 


N.A.FAQs (PDF, 313KB)
Access Tax Agent e-Services
For tax agents to:

  • Have an overview of their clients' Corporate Income Tax matters
  • Perform transactions on behalf of clients
  • View latest correspondences/ notices issued

  1. Your Singpass
  2. Your tax agent firm's Unique Entity Number (UEN)/ Entity ID (e.g. 200312345A)


N.A. FAQs (PDF, 313KB) 
Apply for Certificate of Residence (COR)For companies or their tax agents to apply for COR via myTax Portal  
  1. Your Singpass
  2. Your company's Unique Entity Number (UEN)/ Entity ID
  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, 267KB)
Apply for Payment Plan For companies to re-activate their previous GIRO arrangement for Corporate Income Tax
  1. Your Singpass
  2. Your company’s Unique Entity Number (UEN)/ Entity ID

Submission 
5 minutes

Processing
Your GIRO arrangement will be set up within 3 working days.
User Guide (PDF, 941KB)
Apply for Waiver/ File last Form C-S/ C (Dormant/ Striking Off) (formerly known as 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 file Income Tax Returns for advance* Years of Assessment (YAs) up to the date of business cessation

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

This digital service is available to companies and tax agents.

  
  1. Your Singpass
  2. Your company's Unique Entity Number (UEN)/ Entity ID
  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, 148KB)   
File Estimated Chargeable Income (ECI)
For companies to furnish their ECI within 3 months from the end of their financial year, unless the ECI filing waiver applies

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


  1. Your Singpass
  2. Your company's Unique Entity Number (UEN)/ Entity ID
  3. Your company's revenue and ECI
Submission
5 minutes

Processing
The processing will take 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:
Learn more about ECI filing.
(This digital service for YA 2021 is now available.)  
For qualifying companies to file Form C-S/ Form C-S (Lite)1  

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

  1. Your Singpass  
  2. Your company's Unique Entity Number (UEN)/ Entity ID
  3. Your financial statements and tax computation

Note: You may use the Basic Corporate Income 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. 


User Guides for:
FAQs (PDF, 390KB)
(This digital service for YA 2021 is now available.)

For companies to file Form C
  1. Your Singpass
  2. Your company's Unique Entity Number (UEN)/ Entity ID
  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 Income 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.


User Guides for:
FAQs (PDF, 411KB)  

For dormant companies or their tax agents to file the Income Tax Return  
  1. Your Singpass
  2. Your company's Unique Entity Number (UEN)/ Entity ID
  3. Your company’s unutilised losses and donations to be carried forward, if any

Submission

5 minutes


Processing
The processing will take up to 7 working days. 

User Guides for:
FAQs (PDF, 175KB)

Pay TaxesFor companies to settle their tax bills or generate a Payment Slip No. to make payment via Internet Banking
  1. Your Singpass
  2. Your company's Unique Entity Number (UEN)/ Entity ID
  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 (PDF, 137KB)
Request Penalty Waiver/ Extension of Time to FileFor companies to appeal for waiver of late filing fees, late payment penalties and request for extension of time to file Income Tax Returns and/or accounts upon receiving late filing notification 
  1. Your Singpass
  2. Your company's Unique Entity Number (UEN)/ Entity ID
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 (PDF, 4.58 MB)
Research & Development (R&D) Allowance Account / View R&D Allowance Account

For companies to:

  • Declare the Base Year and Base Expenditure under the R&D Tax Allowance Scheme
  • View its R&D Account
  1. Your Singpass  
  2. Your company's Unique Entity Number (UEN)/ Entity ID
  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 (PDF, 372KB)

Enhanced Revise/ Object to AssessmentFor companies or their tax agents to lodge an objection to the Notice of Assessment or make amendments to the ECI and Corporate Income Tax Return (Form C-S/ Form C-S (Lite)/ Form C) filed
  1. Your Singpass  
  2. Your company's Unique Entity Number (UEN)/ Entity ID
  3. Reasons for revision, grounds of objection and details on voluntary disclosure of errors (detailed in Annex F of the  e-Tax Guide on IRAS' Voluntary Disclosure Programme (PDF, 519KB)), if applicable 
  4. Document files such as original and/or revised copy of tax computation with supporting schedules and financial statements. Each document must be in PDF format with a maximum file size of 2 to 4MB. The total file size in each submission for a YA must not exceed 10MB.

Submission
5 to 10 minutes for each objection or amendment 

Processing
For revision/ objection to ECI and revision to the Corporate Income Tax Return (Form C-S/ Form C-S (Lite)/ Form C), we will respond to you within 3 months.

For objection to Notice of Assessment issued after IRAS has reviewed the Corporate Income Tax Return (Form C-S/ Form C-S (Lite)/ Form 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 of the estimated time needed.


User Guides for:
FAQs (PDF, 227KB)
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 Singpass
  2. Your company's Unique Entity Number (UEN)/ Entity ID
  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 in PDF format (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

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 Singpass
  2. Your company's Unique Entity Number (UEN)/ Entity ID
  3. Your company's registered address and contact information if update is to be done
Note: Update of address and financial year end are 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 updates, you can expect the request to be processed within 3 working days.


User Guides for: 
FAQs (PDF, 168KB)
Update Notice Preferences (UNP) 
For companies to update their notice preferences to receive either email notifications or paper notices
  1. Your Singpass
  2. Your company's Unique Entity Number (UEN)/ Entity ID
Submission

5 minutes

Processing
The change will take effect within 7 days.

User Guide (PDF, 476KB)
View Account Summary
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 Singpass
  2. Your company's Unique Entity Number (UEN)/ Entity ID
N.A.
User Guide (PDF, 112KB)
For companies to view the submission and processing status of their ECI and/or Form C-S/ Form C-S (Lite)/ Form C filed and the progress of Forms submitted
  1. Your Singpass  
  2. Your company's Unique Entity Number (UEN)/ Entity ID
  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 (PDF, 151KB)
View Notices/ Letters - Corporate Tax 

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 filing
  1. Your Singpass
  2. Your company's Unique Entity Number (UEN)/ Entity ID
N.A
User Guides for:
FAQs (PDF, 163KB)
View Donations
For companies to view the donations made to approved Institutions of a Public Character (IPCs)
  1. Your Singpass
  2. Your company's Unique Entity Number (UEN)/ Entity ID
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 digital service.

  1. Your company's Unique Entity Number (UEN)/ Entity ID
N.A-
View/ Cancel Payment Plan 
For companies to view or cancel their payment plan for Corporate Income Tax
  1. Your Singpass
  2. Your company's Unique Entity Number (UEN)/ Entity ID
Submission
5 minutes 

Processing
Your payment plan will be cancelled instantly upon request.


User Guide (PDF, 1.27MB)

 

Others 

Name of Digital ServiceDescriptionInformation NeededEstimated Submission and/or Processing TimeGuides/ FAQs
For companies or their tax agents to apply for PIC cash payout on costs incurred prior to YA 2019 on qualifying equipment acquired on hire purchase via myTax Portal
  1. Your Singpass
  2. Your company's Unique Entity Number (UEN)/ Entity ID
  3. Your company's revenue
  4. Information pertaining to costs incurred on qualifying activities
  5. Hire Purchase Template in PDF format (Maximum file size is 2MB)
Submission

10 minutes 

Processing
Most applications will be processed within 3 months.

User Guides for:
FAQs (PDF, 333KB)

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 3 days from the date of submission of your PIC cash payout application. 

  1. Your Singpass
  2. Your company's Unique Entity Number (UEN)/ Entity ID
N.A
User Guides for:
FAQs (PDF, 132KB) 
For companies or their tax agents to view PIC cash payout correspondence and notices via myTax Portal
  1. Your Singpass
  2. Your company's Unique Entity Number (UEN)/ Entity ID
N.A
User Guides for: 
FAQs (PDF, 124KB)