I've currently got a bit of an awkward situation and I've scoured the entire internet (or what feels like the entire internet) and I can't find an answer. Me and my sons Dad separated over a year ago, however as we have a mortgage together and money has been tight we still live together. All of our finances are completely separate apart from house related bills/childcare. Would I be able to submit a single person claim or would I have to do it as a joint claim although we are separated as we still live together? I don't want to get in trouble! Any help would be massively helpful and appreciated!! :) xx