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@musterclan highly likely the issue relates to lines 28 (child tax credit) or Line 30 (recovery rebate credit), although $2700 is a little "odd" - 

 

what is on those two line numbers? 

how many people listed on your tax return? (you, spouse, dependents)

if there are children, how many under the age of 6 as of 12/31/21 and how many 6-17 years old as of 12/31/21?