Box 1: Yes.

Box 2: It should be based on Box 1.  But whatever it says was what was actually withheld so there isn't any changing that now.

Boxes 3-6: Yes, they should be zero if this is clergy.  Social Security and Medicare taxes are paid on Schedule SE (unless the taxpayer elected out of the Social Security system).

Box 14: Yes, it should note the housing allowance there.

Box 16:  Yes, if PA taxes the housing, then the gross taxable income should be in Box 16 and then box 17 should be based on Box 16.

Box 18 and 19:  I have no idea.