Thanks for getting back to me.
On all occasions, I have written to HMRC Tax Credit Office.
HMRC TCO wrote on 13.11.12 enclosing their checklist TC602(SN) which detailed common reasons why people are overpaid. "To help us get your award right and avoid building up an overpayment it's important that we meet our responsibilities and you meet yours". I met my responsibilities as far as I was concerned by calling them when I was due to go back to work and that I would no longer be claiming tax credits.
The letter also states "If we fail to meet our responsibilities, but you meet all yours, we will not ask you to pay back all of an overpayment caused by our failure. If we have asked you to pay back the overpayment in these circumstances, then you can challenge this decision. If you wish to do this, please complete form TC846".
The letter dated 11 June was from HMRC Debt Management and Banking "regarding Tax Credits of £703.17" demanding payment immediate payment.
* I am employed.
* I separated from my husband on 23 December 2013
* I have not informed the tax office of the separation
* I have not claimed, or renewed any claim for, CTC since my first application in 2002 (for obvious reasons)
* HMRC said that the money was an overpayment which I disagree with
My argument is how can I be sure that I owe anything when HMRC's initial demand was for £2,350.43 (now reduced to £703.17) - it doesn't leave me with much confident when HMRC cannot get their figures right. HMRC still have not told me how they arrived at both figures. I need to be sure whether I owe anything as, as you can appreciate, this is a large amount and I have two children to support, which defeats the object of child tax credit somewhat.
I have spoken to the collection agents about the situation and they have advised me to get in touch with HMRC.
Hope the above is of assistance.