41,600 + 3588 + 1747.20 + 603.20 = 47538.40
So line 21 has (47538.40)
and Line 22 has (5938.40)
IMO.
IF, you had this demand on record for the entire tax year:
"Lawful Money and full discharge is demanded on all transactions 12USC411, 95a(2)"
NOTICE, however, you are only asking for and getting a refund of the FITW,,, namely, 3588.