After you file

@JoshuaPierce77 - the way this worked is you were eligible for the stimulus or the Recovery Rebate Credit but not both. 

 

if you received the stimulus, then Line 30 of Form 1040 should have been zero.

if you did NOT receive the stimulus, then Line 30 would show what you were eligible for.

 

the 1st two stimulu payments were reconciled on the 2020 tax return

the 3rd stimulus payment was reconciled on the 2021 tax return.

 

Sounds like you have an amount on Line 30, but the IRS zeroed it out because their records indicate they sent you the 3rd stimulus already.  Again, you either receive the stimulus or the Recovery Rebate Credit, but not both.