Go to Search at the top of the screen and enter Form 1099-NEC in the search box. You should see a Jump To function to take you to the 1099-NEC input screens. Select the 1099-NEC you want to delete and click the trash can to delete the form.
The form 1099-NEC is new for 2020 and reports non-employee compensation that was previously reported on 1099-MISC. If you have a 1099-MISC in your income screens you need to delete that also using the same procedure. Normally you receive a 1099-NEC if you perform services for a trade or business.