Best Practices when Corresponding with IRAS


We encourage you to use myTax Mail to correspond with IRAS as it is a secure platform. 

If you prefer to correspond with us via email or letter, please provide the following information to enable IRAS to respond to you promptly.

  1. Please specify the company’s name and tax reference number.
  2. Please provide the name and telephone number/ email address of the contact person from your company.
  3. Please state the subject matter of your correspondence clearly, e.g. Objection to Notice of Assessment for the Year of Assessment (YA) 201X, Revised tax computation for the YA 201X, or Reply to Query for the YA 201X.
  4. If you know the division (e.g. Corporate Tax Division) and officer-in-charge* of your case, please indicate them in your email or letter.

    (* You may use the View Officer-in-charge e-Service to find out the name of the officer-in-charge.)
  5. For objections or revised tax computations, please log in to myTax Portal and use the Revise/ Object to Assessment e-Service to file an objection or revised tax computation. Alternatively, you may submit the Form for Filing Notice of Objection (PDF, 785KB). If you had previously filed Form C-S for the YA concerned, please also attach: 

    a. Original tax computation with supporting schedules;
    b. Financial statements [if you did not file XBRL financial statements to the Accounting and Corporate Regulatory Authority (ACRA)]; and
    c. Detailed profit and loss statement.
  6. If you are providing supporting documents in response to IRAS’ queries, please label them with reference to the specific query number in our letter.