Do I need to file an amended return 2017 if the error is from IRS and I believe

[ithiam2016]

I am aware of an issue with my 2017 return only last month in March. Based on the transcript it said "Math error". I tried to review my return multiple time and still do not see any error and I noticed that IRS did not apply Foreign earned Income exclusion to my return inspite of me applying it.

in this case do I need to file an amended 1040X or just preparing a letter explaining my findings?

[CatinaT1]

You can only amend returns 3 years back. For instance, 2021 returns were due April of 2022, so the last date to file an amended 2021 return was April 15, 2025, 3 years from the original due date.

Did the IRS recently send you a letter? If not, you will not be able to make any changes.

[ithiam2016]

Thank you. Yes IRS sent me a notice CP71C on March 10, 2025.

[CatinaT1]

Ok, great! Does the letter have a section that says, What if I don't Agree with the Changes? Here it should tell you what to do. Many times they will indicate if they want you to file an amendment or not. Usually they don't.

[ithiam2016 · Accepted solution]

Thanks CatinaT1. I check the notice and there is no indication file an amendment. But to review my transcript and/or make payment arrangements.

[CatinaT1 · Accepted solution]

If you don't agree, I would send them a letter then.