Jump to  Filing your Final Tax Return Albert Einstein once said: "The hardest thing in the world to understand is the Income Tax." Welcome to Adulting 101. As adults and contributing members of society, we all will, eventually, have to deal with taxes. Dealing with taxes even in your native language can be very challenging, imagine doing this in Japan, in Japanese. *cue nosebleed Before we jump into the steps of filing your Final Tax Return, let's go ahead and explain some of the words you will be encountering while you deal with this. 源泉徴収 (Gensen Choshu) - Withholding Tax Gensen Choshu(源泉徴収) is the process where your employer estimates how much income tax you will need to pay and will withhold that amount from your monthly salary. In other words, withholding tax. Your monthly payslip will show how much tax you paid and since this is just an estimated amount, there are instances where you either over or underpay your taxes. Whether you overpaid or underpaid your taxes w