On the Schedule C worksheet, check the "yes" on the VERY top of Schedule C.

Then scroll about 40% of the way down, to just under Line 48 to see the QBI worksheet.  Look at the worksheet carefully to determine if the business has QBI or not (some things may be reducing the $4k profit for QBI purposes).

Some of those numbers from the worksheet will feed into Form 8995 (on the Deductions tab).