<prompt> Human: Full Background- This was a joint brokeage account at Charles Schwab from 2006 and has since been inactive. I just found the 1099 from that Year and We have not been claiming the capital loss.I know that capital losses carry forward indefinately, but does it still when its not claimed? and Is it still possible to go back and claim the losses on our tax returns for this yearIve looked everywhere on this sub-reddit but did not find anything on this issue, appreciate all the help and thanks  <response>: Generally its the later of three years from due datefiled or two years after the last payment for that year. An exception exists for capital losses, which is up to seven years. 