I made a gain of €3975 on shares sold in 2005. I would like to offset a loss of €797 from eircom shares originally bought in 1999. Should I deduct my €1270 allowance and calculate 20% for tax due and then subtract my loss from eircom shares ie, 3975-1270 = 2705 then 20% of that is 541 and then offset my earlier loss of 797 ?