If you have received a letter or SMS informing you that you have been selected for NFS, you are not required to file an Income Tax Return.
Your Notice of Assessment (NOA) or tax bill (digital or paper format) showing your income tax payable, if any, will be sent to you from Apr 2021 onwards. Your NOA is computed based on your auto-included income and previous year's relief claims, which may be adjusted if you do not meet the eligibility criteria.
How can I verify that the information is correct before IRAS finalises my tax bill?

You may verify the details of your auto-included information and preview your Notice of Assessment at myTax Portal using your Singpass or IRAS Unique Account (IUA) from 1 Mar to 18 Apr 2021.
What if I have additional income and changes to my personal relief claims?

What should I do after receiving my NOA?
You need to check your NOA to ensure that it is correct. If you have any other income that is not shown in the NOA, or your relief claims in the NOA are incorrect, please file an objection within 30 days from the date of your NOA using the “Objection to Assessment” e-Service in myTax Portal.
You can refer to the
Frequently Asked Questions (FAQs) for more information on NFS (PDF, 517KB).