Our Sources

The core library is the BIR Citizen's Charter, the BIR's official published catalogue of taxpayer-facing services. It covers requirements, forms, fees, processing times, and where to file for everyday procedures like registration, TIN issuance, authority to print, and business closure.

Alongside the Charter, AskOnward also indexes selected Revenue Memorandum Circulars (RMCs), Revenue Regulations (RRs), and key BIR forms. These fill gaps when a mid-year issuance updates a procedure before the next Charter edition is released.

Generic AI tools often answer tax questions from the open web, forums, or outdated blog posts. AskOnward searches a curated library of BIR publications first, then explains the matching passages in plain language. That keeps answers closer to what the BIR actually publishes, and farther from hearsay.

When a question sits outside this library, AskOnward says so instead of guessing. You still confirm important details with the BIR or a qualified professional before you act. See our Disclaimer.

• The Citizen's Charter is the BIR's own public service catalogue, updated by edition. It is the clearest single reference for how common BIR transactions work.
• Keeping several recent Charter editions helps AskOnward prefer the newest wording while still recognizing services that older editions described differently.
• RMCs, RRs, and forms catch time-sensitive updates (deadlines, eBIRForms packages, filing guidelines) that may not yet appear in the latest Charter snapshot.
• Every document in the library is a public BIR publication. AskOnward is not affiliated with the BIR; we read the same materials anyone can download from official channels.

This list reflects what is currently indexed. It updates when new official documents are added to the knowledge base.

AskOnward is not a substitute for a CPA, lawyer, or the BIR itself. It does not cover foreign tax systems, and it does not claim that every RMC or RR ever issued is already in the library. For the latest mid-year memo that has not been indexed yet, verify directly on bir.gov.ph or with a qualified professional.