How to register BIR

Hi,
I'm foreigner working in Makati, I'm going to register seller account on Lazada to sell products online. The registration required BIR but I'm confusing how to register for that license. Also some of the document terms I don't really understand. Could someone assist, please?
Thank you

I think the reason what you need from BIR is the Tax Identification Number which is in the TIN ID after you have submitted the requirements. I think you just need to give a photocopy of your birth certificate or valid IDs.