here is my idea

- an agent from Census and Excise office (rank taxman or Taxtaker) appears once per month within your stronghold asking you some gold (250?) to pay. You may refuse to pay, but the tax collector will return next month asking you 500 gold and so on. When you have 1000 or more gold to give to the census, the pc gets a bounty.
The tax may be paied directly also to the old Sococius Ergalla (he has no other purpose in game).
The taxman should appear when the stage 1 is completed.

I would like this mod, as it definitely adds some realism! It also adds a nice money sink, as I find late game that I run out of ways to spend my extra gold.

BY "within" your stronghold do you mean actually inside? I ask because it might conflict with a lot of stronghold mods that change the inside of strongholds, but I like the idea!

Something else that might be nice to add at some point would be a courtroom/trial type mod for PCs that get arrested. Morrowind already has judges in the game like this NPC: http://www.uesp.net/wiki/Morrowind:Rufinus_Alleius, but other than one Fighter's guild quest he really doesn't serve any use. Plus, it would go nicely with your tax collection and go to jail features of the mods you've made