Losses

Hi, I am making a disclosure under the Let Property scheme. I am trying to understand the process of carrying over losses but have had several different answers on the helpline. I have had losses in 2011 (undisclosed) can I still use them to offset profits in the subsequent years and if I can for how long are they valid, is it indefinitely as I have read in a trade tax forum? Thankyou, CC

Hi, Is anyone able to offer advice on this post please? Thankyou, CC