Audit

My wages $10,136.00

Federal tax withheld $983.00

Unemployment $9,942.00

Federal tax withheld $993.00

Other income gambling $1,620.00

Federal tax withheld $0.00

3 dependants under 16yrs old

My tax preparer used prior yr earned income $16,441.00 

AGI $21,698.00

Earned income credit $6,274.00

My refund $12,461.00

I got audit 2021 return I received $1,687.00

Did my tax preparer make a mistake.