OK, I bet you will recommend I speak to a CPA to answer this but here goes. I have paid the mortgage on the house for the last year in lieu of alimony and child support. My STBX still lives there. Is the portion of this which would have been alimony deductible from my taxes this year?
Unless the payments were encompassed in a written agreement or court order, no it is not deductible as alimony.