Field help:
7.Church tax of the spouse
Enter the amount from line 7 of your employment tax statement:
"Church tax withheld for spouse from 3. (only in interdenominational marriage)"

Enter only the amounts shown there. Church tax from a different employment tax statement (e.g. the spouse's) must not be entered.
An interdenominational marriage exists if the spouses belong to different churches, e.g. Protestant and Catholic.