Paul - yes you can deduct the difference between box 5 and box 1 as a capital loss. You will need to see if you made any contributions in 2012. If you did, you will need to prorate box 1 between the contributions made before 2012 and those in 2012. The contributions made before 2012 will be long-term capital losses and those made in 2012 will be short-term capital losses.
Answered on Feb 18th, 2013 at 10:58 AM