Tax diary June Sue Lucas 23 May 2017 Share June is a very busy times in the tax calendar, with critical filing dates. Date What's due 1/06 Corporation tax for year to 31/8/16 19/06 PAYE & NIC deductions, and CIS return and tax, for month to 5/6/17 (due 22/06 if you pay electronically) corporationdiarytax