If you're trying to enter the DPAD from a cooperative off of a Form 1099-PATR, don't use the Form 8903.  Enter it in the smart worksheet on Schedule F below question G.  That will populate it to the Form 8995A

If you're trying to flow the cooperative DPAD deduction from a partnership K-1 onto your return, go way down on the K-1 worksheet to Section D2 line K.

There is also a similar line on the S corporation K-1 worksheet if flowing the DPAD from an S corporation. .