I done my renewal yesterday after an hour on hold 
My payments have been stopped because they never updated my address but that's a whole other rant.
I was on maternity leave last year and stupidly assumed that it wouldnt matter.
They informed me that they deduct £100 from my total income for every week I was on maternity leave meaning £3900 has been deducted from my total income of £7000.
I am now worried sick that I have been overpaid and will need to pay a significant amount back to them. The person on the phone couldn't tell me and said I'd just need to wait and see what the final decision was.
I put the lower figures into the calculator and it said I wasn't entitled to anything at all 
Has anyone else been in this situation?
I was under the impression the less you earned the more tax credits were awarded but it doesn't seem to be the case.
I'm quite worried now.