Once I add what I have received in stimulus checks it makes my federal refund decrease. Why? I thought this was not suppose to impact my income?

[OZRK3261]

Turbotax placed my $600 stimulus check for 2020 (I got my second one in 2021) which increased my total tax paid above what I owed.  Therefore, it calculated a refund.  I file my return online through turbotax on 2/18/20.  This week of May 2, 2021, I received a letter from the IRS saying I owed $265 instead of receiving a $335 refund.  Now, what I need to know is which one is correct.  I will never use turbotax again if I find they made a serious mistake.  And to think I paid them $90 and cannot even talk to a human live voice to get a correct answer.  I did the math, and that $600 placed on line 30 of the 1040SR return is the difference between a refund and a payment.  Now, I do have to question which one is correct???????????  

[ThomasM125]

When TurboTax asked for the amount of the second stimulus check that you received, you should have entered $600, even though you received it in 2021. If you didn't enter that amount, it would be included in your refund as listed on your tax return, but the refund amount would be wrong, so that is why the IRS removed it. So the balance due of $265 is correct based on what you described.