Guidance on Completing Form C-S/ C

Guides to complete Form C-S/ C online or via paper filing.

Go paperless! All companies can e-File Form C-S/ C!

Benefits of e-Filing

  • On-the-spot guidance as you e-File, with the iHelp facility
  • In-built formulae to auto-compute certain fields
  • Save draft until you are ready to submit
  • Get your estimated tax payable on-the-spot
  • Receive instant acknowledgement when you have successfully e-File
  • Extended filing deadline of 15 Dec, instead of 30 Nov

Before Completing Form C-S/ C

All companies need to prepare the following before completing the Income Tax Return (Form C-S/ C):

  • the audited/ unaudited financial statements,
  • tax computation and supporting schedules, and
  • other claim forms

For more details, please refer to Documents to Prepare when Filing Form C-S/ C.

Filing Form C-S

Filing Form C

e-Filing of Form C

You can e-File Form C in two ways:

ModesHow to e-FileSuitable for 
Online Form CComplete and file Form C online. Attach tax computation, financial statements, detailed profit & loss statement, other supporting documents and submit them to IRAS. All companies/ tax agents 
Form C (Upload)Download and complete Form C (PDF format) at your own time and convenience, in your local machine. No signature is required in Part V Declaration. When the Form C is completed and the file is saved in your local drive, upload it to myTax Portal and submit it together with tax computation, financial statements, detailed profit & loss statement and other supporting documents. Please upload the original Form C (PDF Format). Do not upload a scanned or printed copy of Form C or Form C-S.Companies/ tax agents who need to show the completed Form C to obtain approval prior to submitting the Form C to IRAS


Online Form C:

Form C (Upload):

Paper Filing of Form C


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