Form 6251 is for Alternative Minimum Tax (AMT). If you did not pay AMT last year, you could enter $0 or leave the field blank.
Here's more info:
https://ttlc.intuit.com/replies/3299960
Per @MarilynG
If that does not work you may delete the form.
Delete Form 6251 by following these steps:
- From the left menu, select Tax Tools
- Tools
- Delete a form
- Scroll to Form 6251 and confirm you want to delete it
- Continue on with your 2020 tax filings
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
