Mrs

I and my husband have signed a separation agreement almost two years ago. We still live in our matrimonial home but separate lives . We are not considering a divorce right now. Does one of us have to move out to make the separation legal ? When I filed my taxes last year the accountant told me that I couldn't do it as "separated" because we were still at the same address ... We are staying in the same house for our child and economical reasons ..what do you suggest at this point...