Entries on Form 1099-G, Box 6 Taxable Grants (this covers certain government payments) are generally reported on IRS Schedule 1 (Form 1040), Line 21. If the item relates to an activity for which you are required to file Schedule C, E, or F or Form 4835, report the taxable amount allocable to the activity on that schedule or form instead.
To make this entry on Schedule 1 (Form 1040), Line 21:
If there is a Federal income tax withheld amount in Box 4 of the 1099-G, this amount would need to be entered during the Unemployment compensation portion of the Q&A as there is not a section for this in the other income section: