Check This Entry Schedule C (uber): Principal Business Code must be entered. Enter a valid 6 digit business activity code between 000001 and 999000, or enter 999999. Prin

Check This Entry
Schedule C (uber): Principal Business Code must be entered. Enter a valid 6 digit business activity code between 000001 and 999000, or enter 999999.
Principal Business Code
I can't find this 6 digit code