What must my Philippine company set up with the BIR?

A certificate of registration for its tax types, registered books of account, and approved invoices or an e-invoicing system before it issues its first sale. It then files monthly and quarterly returns from the first period, even with no sales. Late or missing returns carry penalties, so appoint an accountant early.

Accounting and tax filing

Source: Penalties for late filing of tax returns, Bureau of Internal Revenue, Philippines