After years of humming and hawing I've decided to buy a house for Mrs X and I to live in. Currently, I have two flats, one I live in, the other I rent out. I'm also a guarantor on a mortgage for a wee flat Mrs X's daughter lives in (she pays the mortgage and will eventually have only her name on the mortgage). I intend to sell both flats. For any accountants looking in does me being a guarantor on another mortgage make me liable for this second property tax and is there a way around it?