Halve the taxes for your other lands

You better not make your new subjects suffer... You show them some care and halve their taxes. They would have paid you only a friction of the average yearly tax anyway, as they too barely had anything to tax... But now you have halved even that! You are kind, but do you have enough money to pay the royal taxman?

As you have taken the money from there, so you have taken the responsibility to pay the tax from it! Let's hope it was worth it!