e-FILING Calendar When: January 23, 2018 all-day 2018-01-23T00:00:00+08:00 2018-01-24T00:00:00+08:00 e-FILING LAST DAY OF e-FILING BIR Forms No. 2550M and 2551M for December 2017 (eFPS filers under Group C) Posted in .