One on my dependents was not claimed on child tax credit

If you need to make a change or adjustment on a return already filed, you can file an amended return. Use Form 1040-X, Amended U.S. Individual Income Tax Return, and follow the instructions. Form 1040X cannot be filed electronically.

You should amend your return if you reported certain items incorrectly on the original return, such as filing status, dependents, total income, deductions or credits.

However, you don’t have to amend a return because of math errors you made; the IRS will correct those. You also usually won’t have to file an amended return because you forgot to include forms, such as W-2s or schedules, when you filed — the IRS will normally request those forms from you.

Yes, you will have to amend your return.

 

Some quick ground rules:

1. Be sure the original return was filed and accepted.
2. DO NOT go back into the return or change anything before you start the amendment process.
3. Gather everything you need before you start.
4. Complete the entire amendment process before you log out.
5. Starting with 2019 tax returns you can E-File a 1040-X amended tax return.  All prior years must be printed and mailed.

 

You can correct a return that you've already filed and had accepted.  Select the year that applies and use this guide to proceed.

Select your tax year for amending instructions:

• 2020
• 2019
• 2018
• 2017

 

For additional information please refer to  How to Amend