also uhh...i kind of read more up on the different types of imperial tithe types, and uhhh. QM might have fucked up.
https://wh40k.lexicanum.com/wiki/Aptus_Nonhttps://wh40k.lexicanum.com/wiki/Imperial_Tithe"Space Marine homeworlds, planets belonging to the Ecclesiarchy[6], and Forge Worlds of the Adeptus Mechanicus do not normally have tithes, and are given the tithe grade Aptus Non, though Space Marines must provide a separate tithe in Gene-Seed to the Administratum."
so uhhh, we shouldn't even need to be paying taxes...or was there something you know about QM that these sources might have it wrong in? are we just not designated a forge world yet in the imperial bureaucracy?