To 1-up a bit, in the UK (and probably several other countries) you usually do nothing at all. The tax is deducted by your employer at time of pay and you just get annual statements that you usually do nothing with. If you are due a refund (e.g. salary went down so your projected yearly income was wrong), you usually get refunded automatically by giro or cheque (or possibly compensatory tax code changes for the next year. Not sure)