Ah, I see... you got a money problem in the game
I don't know which values have to be edited, but apart from that, I wouldn't recommend it... to my opinion it kills the challenge and the fun of the game. There are many ways to earn money in 1404, taxes are only one possibility... I make most of my money by trade, either passive (selling goods at my warehouse) or active (loading goods onto a ship and delivering them to Lord Northburgh or Al Zahir). Especially ropes get paid very good in the beginning of the game, later weapons and glass are interesting to sell.