They should be stripped of that anyway. The church as an entity.
I believe orgs like Catholic Charities and the Sisters of Mercy will be OK.
Can't tax religion, it's unconstitutional. It violates the First Amendment, sorry.
Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances
Hypothetically? It would pose an undue burden on new religions, favoring established well off denominations of Protestantism, Judaism, and Catholicism .. . . which would, by default, amount to the state sanctioning those as establishment religions.
Taxing religion interferes with the "free exercise thereof." Sorry godless atheist. . . YOU ARE SHIT OUT OF LUCK.