To pay for your taxes through GCash, just follow these easy steps:On the GCash App, select Pay Bills.Select the category of ‘Government’.Select ‘BIR’ to pay.Input all relevant biller details: Form Series ( 0600, 1600, 1700, 1800, 2000, 2200, 2500) Return Period TIN Branch Code (add 00 first if you only have 3 ...Confirm payment details to proceed payment.Payment successful!