Retirement tax questions

Hi Thomas,

Thank you, now I see the issue.

I worked as a contractor Project Mgr for my last company. I was a full time employee, then they made me a contractor for 4 months to find another job. They sent me a 1099-NEC and when I upload the form, it shows a Schedule C form saying I need to input a Principle Business Code. Enter a valid 6 digit business activity code. This is why it's thinking I need Form 3801, which I don't. What do I put in for a business code or how do I update this to have form 3801 go away?