Clergy residence deduction second page field won't take a number and that's the one I need...to give box 30 amount. It will only allow Part B...a glitch?

The box 30 amount must be entered on your T4, which you can access by going to Income > T-Slips > T4.  Use the Box 30 labeled Clergy housing allowance.  When you return to the Clergy Residence Deduction section you will see the amount there for Part A.