e-FILING/FILING and e-PAYMENT/PAYMENT Calendar When: May 10, 2018 all-day 2018-05-10T00:00:00+08:00 2018-05-11T00:00:00+08:00 e-FILING e-PAYMENT FILING PAYMENT LAST DAY OF e-FILING/FILING and e-PAYMENT/PAYMENT BIR Form No. 1600 for April 2018 Posted in .