you were eligible for the 3rd stimulus or the Recovery CRedit, but not both.
During the interview process, TT asked you how much you had received in 2021 (march - May, 2021). It also referred you to Letter 6475 that detailed what the IRS sent to you.
if you entered a number that did NOT match what the IRS knows it sent to you, it had the effect of correcting Line 30 which in term reduced the refund / increased what was due.
Line 30 is simply the number of people listed on your tax return times $1400 LESS what you already received, but not less than zero.
The biggest error I see on these boards is someone who filed "joint" and did not understand that Letter 6475 was separately sent to each spouse and the two letters were to be added together
Suggest checking you bank account records from March - May. 2021 to be comfortable that you did indeed receive $1400 for eachy person listed on your tax return.
