Transitioning from non vat to Vat

Good day po, I am fairly new to tax filing and naliligaw po ako. I have done some research but it would help po if someone could confirm.

So i earn through professional income and i have two COR non vat, one for main and one for branch. Recently po, I was advised to convert into vat as my gross income is past 3M.

For the process po, this is what i researched:

• I need the COR for both branch and main
• 1905
• Valid ID
• 1906
• Inventory list of unused receipts. ​

Tyia po sa sasagot!