Forgot to tell tax credit about new job?

A question about : Forgot to tell tax credit about new job?

Please don't shoot me, I know it's really bad. I started a job last September, and I completely forgot to tell the tax credit office.
I was earning under Ј5000 p/a, but have now been promoted and will be earning more. I was just looking at the HMRC page to see what to do about telling them, and realise I should have told them back in September. I am scared I am going to get a fine or worse .
Does anyone have any advice?
Thanks

Best answers:

• Tell them now because the situation won't get better by ignoring it. You're not going to get anything worse than a fine. You could try telling them you're really a multi-millionaire with money stashed in a Swiss bank account - that seems to work!
• I'm definitely going to tell them now, as my income has gone up. Before I was earning well under 5000 so I don't think it would have affected it, but now I have gone over that.
  I am just really worried about it.
  Thanks.
• They will adjust any overpayments in next years award.
  Good luck in getting through to them on the phone lines- that will cost you your pay rise!!
• I am doing min 16 hrs p/w, and partner does 10 +
  Thanks
• Anyone got the FAX number for Tax Credits