Note that if you do list deductions to itemize, you can only deduct the part of the expenses that each of you actually pays. A married couple, if filing separately, has some freedom to allocate the deduction to one spouse or the other. An unmarried couple does not have that freedom, you can only list as deductions, the expenses you actually pay for. If paid from a joint account, you have to figure out how much each person put into the account.
