HMRC Admin 4 I am desperately interested in your reply to the last post. How can HMRC possibly justify taking notice of DWP figures which you know to be wrong? It is, as you say, an “unfortunate common issue”, but it would not be an issue at all if, together, HMRC and the DWP were to rectify the problem.
This is simply a matter of totting-up what you received in the tax year. You can do that by looking at your bank statements. There is no need to mess around with weekly rates and weeks. A problem will almost certainly come when HMRC say that they can’t accept your figure because it fails to tally with what they have been told by the DWP. When that happens, dig in your heels.