If you attach a
1099-MISC to your business (
Schedule C), we'll automatically include that income on your
Schedule C. If you enter the amount again on the
Other Income and Returns Expense screen, the
1099-MISC income will end up being doubled on the
Schedule C.
Make sure you didn't enter the
1099-MISC income on the question that says "Enter any amount of gross receipts or sales that were NOT reported to you on a
1099-NEC or
1099-MISC".
The 1099-NEC income is doubled on my business (schedule C).