Bdo P.E.R.A. Retirement account question

[strangedreams]

Government employee ako and Meron kc ako tax credit certificate dito kay bdo tpos nag ask ako kay accountant nmin if pwede sya mabawas sa tax na binabayaran ko and sbi nya ndi daw pwede, it expired on december 2023 hinayaan ko n lng,

Question is gusto ko p rin maghulog dito. Paano po kaya ang tax credit ko magagamit ko ba as a government employee?