I had a rather horrifying experience just a few moments ago, after years of not using the banks because of not wanting to waste a single coin on tax, i ventured to the bank to see how much the tax would be on 75k which i needed to set aside for something important.
I was rather surprised and horrified to find out once you enter the amount, and the npc tells you how much he is going to tax you there is no option to cancel the deposit. So once i entered the amount, and finding out i was about to loose 10500gp i couldn't do anything.
While waiting on a dm for some help i also noticed that i couldn't seem to find any stated account balance while i was pulling my 64500gp back out.
Is it possible to add another step in the process that gives you the choice to yes/no the deposit. And perhaps something in the combat or convo log that states "This is your current balance: ________"