paid for new car tax disc with a cheque in post office but it bounced as didnt quite have enough money when they took it out (got paid the day after) my old tax disc doesnt run out until the 31st, but what are they going to do? send me a letter saying "send them payment" or what? - how does it work. i could quite easily pay by card or whatever now. do i have to wait for the letter, will they return my cheque. any advice. been charged £30 by the bank aswell, but fare enough my fault for not checking my balance. will i get charged by mr tax man aswell?