I have a client who has come to me with outstanding tax returns for 07/08, 08/09, 09/10 and 10/11. He also included some CIS vouchers he found relating to the 06/07, when he was running a limited company. The CIS vouchers have been made out to him using his own personal card and he believes he hasn't had these deductions allocated to him. What's the easiest way to find out whether they have and if they haven't can he use them against 2007/08 return or make a separate claim for them? Any help would be greatly appreciated in this manic time of the year!