As it is nearly the end of the tax year, I realise tax credit rates are about to change. I am not in the position where the new upper limits are going to apply. But I have several employed jobs and two self employed ones and so it's not as straight forward as "this is my salary" as there's lots of parts to add up.
My income has increased from 2010/11 but not as much as £10,000, so do I need to inform them before the annual review letter comes? Also, my self employed records are such that I do know what my profit on those are, but as I don't have to do my tax return until January 2013, couldn't self employed people legitimately not know what it is until nearer then? How does being self employed work with tax credits?
I suppose I'm concerned I will get overpaid as my income has increased - maybe I should call HMRC once we are into the new tax year. And one other question - I presume I have to let housing benefit know if there is any change to my tax credits (due to my irregular earnings I tell them whenever I earn anything so I'm quite often there 
)