"I'm in the smart check phase of my federal tax return and got an error message,"schedule C: principal business code must be entered. Enter a valid 6 digit business activity code...". My husband had 2 1099-MISC documents that I entered the info. I don't understand what the error is or what other info I'm suppose to enter. What is the "6 digit business activity code"? I only have the Payer's TIN # which is 7 digits.
