i received a letter from inland revenue earlier this year saying that due to my not informing tham of my earnings, they would be taking £500 from me in tax year 05/06...i cant be sure as ive filed the letter away but i think it dates from 02/03. i havent a clue how this happened. i know that theyve done this before and made me pay back £70 from a couple of years before, this i took to be a mistake on their part as i was claiming working tax credit and i think they had also screwed up my tax code, it being lower than it should have been. i let that one go but now i really dont understand how they can say i didnt inform them of my earnings. i had to renew the claim every six months, april and october. as far as i can recall, no-one in our company had a rise in the april as we previously had done. add the fact that i was made redundant in may this year and i am now claiming benefits. what will they do? and is it right that they can do this? i dont even know where the mistake was made. ive heard that if the mistake was on their part and reasonable that i wouldnt have known about it, i can get a form from them requesting it not be paid back. is this correct? if so whats the form?