Why do I have a capital gain carry over from last year. I didn't have a loss that I am aware of. How do I see where this comes from

[MikeinSC]

Check your prior year Schedule D.   If your net capital loss was in excess of $3,000, that amount of loss will carryforward to 2020.

[JohnB5677]

After you've checked your 2019 return and confirmed that should not have received the carryover. 

You can correct it on your 2020 tax return by:

1. Income
2. Scroll to Investment income
3. Select Capital loss Carryover
4. Make your correction.