HUNTINGDON'S newest accountancy firm is reminding companies that Sunday (May 31) is the last day for issuing P60 forms for 2008\/09 to employees. Haines Watts, whose offices are in St Clement's Passage, adds that the following day, June 1, is the due date for payment of Corporation Tax for period ended August 31 last year. And a host of tasks must be completed by the end of the month. June 30 is the last day for UK businesses to reclaim EC VAT chargeable in 2008. Also due is the annual adjustment for VAT partial exemption calculations (March VAT year end). And it is the filing date for Corporation Tax Return Form CT600 for period ended June 30 last year.