@Sher07 - so here is what occured.
1) you were eligible for $2800 for the 3rd stimulus or the Recovery Rebate Credit, but not both. (I assume there were two people listed on your tax return, either as taxpayers or dependents)
2) during the Turbo Tax interview process you were asked how much you received for the 3rd stimulus. You must have answered zero. And that placed $2800 on Line 30.
3) The IRS records indicate that they sent you the 3rd stimulus already, so they removed the $2800 from Line 30 which had the effect of reducing the refund by the same amount.
4) Check you bank account statements from March - May, 2021. if you see the $2800 direct deposit then the IRS adjustment is correct. DO NOT DO THIS FROM MEMORY; please look at the bank account statements.
5) if you have no record of receiving the $2800, then the dilemma is that you don't beleive you received it, but the IRS records state they sent it. In that case, you'll have to complete and submit the 'tracer' form to determine where the $2800 went.
6) there is no need to amend your return. The IRS has already done that
does that make sense?
https://www.irs.gov/pub/irs-pdf/f3911.pdf
