We have just got a form from the Revenue asking us to verify that we are claiming for everything we should be. And well it seems we are not. There is no mention of the 900e Credit for me being a SAHM. Im sure it wont be hard to amend, I am concerned tho that it hasnt been applied in previous years. It was before, Im a sahm a long time, but we have moved house and jobs over the last few years. Can it be backdated? Does that mean we may be entitled to a refund and if so, how would I calculate that out roughly? Many thanks.