My Challan of payment of Advance Tax or Self Assessment Tax does not contain correct PAN or Assessment Year. Will the claim be allowed?

No. You are advised to get it corrected by making written request to Branch of Bank from where payment has been made upto 15 days of payment and thereafter to your Assessing Officer. Detailed challan correction mechanism is available at LeftMenu_ChallanCorrectionMechanism_26082011.pdf