Get your taxes done using TurboTax

Line  20 on 1040-X shows AMOUNT YOU OWE $988.  Not sure why I owe more when I only added a business expense of $220.00 which lowered my AGI to $149,806....under the $150,000 to claim the Stimulus credit.  I went back to the start and Amended the return again taking out the business deduction as well as the Stimulus..taking it back to the original.  I first entered the business expense of $220 on Schedule C which lowered my AGI.  Then went in and claimed the STIMULUS payments of $2800 (hubby and I). So I did everything as suggested.  I just can't figure out why I now owe additional taxes of $988?  This is an additional amount owed on top of what I have already sent in back last year which flagged the IRS because our AGI showed $150,010 ($10 over threshold to claim Stimulus Credit)....which TURBO TAX didn't catch.  

Have any suggestions or anything I can try?