Hello everyone, just wanted to share. eto ung reply sakin ng BIR when I sent an inquiry to them last year. I sent an email here: contact_us@bir.gov.ph
Sa experience ko, within 24 hours nagreply naman sila agad.
"If the previously printed copy is no longer available, the employer can generate a new copy using the details of the employee as reported in the alphabetical list attached to their BIR Form 1604CF submitted by the employer to the RDO for the year involved."
"For other inquiries, you may call us through the numbers 981-7003, 981-7020, 981-7030, 981-7040, 981-7046 or you may visit our website through the link http://www.bir.gov.ph/ We appreciate your continued support."
Hope this helps! All the best! ๐