IRAS' digital solutions make filing of the Corporate Income Tax Returns (Form C-S/ Form C) easier and more convenient for tax professionals and companies.

Key Partners in IRAS’ Strategy to Leverage Technology to Make Filing More Seamless

Tax agents and tax software providers are IRAS’ key partners in the use of technology to make tax filing more seamless and convenient through different digital solutions. These solutions have simplified the tax filing process for our partners and helped them and their users achieve greater productivity gains.

Filing ECI and Form C via EVN

The External Value Network (EVN) is a secure dedicated network that allows tax agents to file their clients' Estimated Chargeable Income (ECI) and Form C seamlessly over secured platforms.

To date, 5 tax agent firms have successfully integrated with IRAS’ system to file their clients' ECI and Form C via EVN.

The tax agent firms in alphabetical order are:

Filing Form C-S via API

IRAS has partnered tax agents and tax software providers to enable seamless filing of Form C-S via the Application Programming Interface (API). This solution allows users to submit the Form C-S directly to IRAS from the tax software, eliminating the need for users to log in to mytax.iras.gov.sg to input the tax figures manually. This in turn reduces transposition errors and improves the accuracy of the data submitted to IRAS.

To date, 1 tax agent and 2 tax software providers have successfully connected with IRAS’ system to enable the filing of Form C-S via the API.

The tax software providers* in alphabetical order are:

The tax agent firm is:

More tax agents and tax software providers will be listed progressively when their solutions are enhanced with the seamless filing capabilities.

IRAS has also partnered accounting software providers to enable their users to submit the Form C-S directly to IRAS using the API technology.

Learn more about using accounting software to prepare and file Form C-S seamlessly.


* The above tax software are provided by third party vendors that are not associated with IRAS. If you wish to use the solution, you should do so based on independent consideration and exercise reasonable care. IRAS shall not be liable for any loss or damages arising from or in connection with your use of or reliance on the solution.