7203 goes with the 1040, its in the list of forms there.

Use the "Basis" form in the S corp program. It mimics the 7203. If you import the K-1 from S Corp to 1040 it will transfer some of the information to the 7203 but you need to fill in the missing info and confirm bottom line allowed or unallowed items. If you don't import the K-1 then just copy the info from the Basis form onto the 7203.