It depends on specifics you didn't provide, and providing them here may not be easy to do. I pulled up the instructions at https://www.irs.gov/pub/irs-pdf/i8990.pdf and did a search for "sch" and got 14 hits. Nothing from the 8990 is entered directly on the 1040. But it gets entered on a Schedule that is filed with the 1040. Which schedule, (SCH 1 thru 6 or A-F) depends on the details of the 8990 you completed.
So search the instructions for "sch" and check each of the 14 hits to see which (if any) apply to you and your specific situation.