Setup of Business account - Eonic/ProteanCMS GitHub Wiki
Below are the steps need to follow..
Set up Google Pay for Business.
Step 1: Sign up for Google Pay for Business.
Step 2: Verify your bank account.
Step 3: Google Pay reviews your sign-up.
Step 4: Integrate Google Pay to your technical platform.
Step 5: Test and start using Google Pay.
https://support.google.com/pay/business/answer/7684271?hl=en
Sign up for Google Pay for Business.
You will get MerchantID to proceed further (which is crossed in above image in red color. Its alphanumeric code).
Save Business Profile with bank details and follow the steps accordingly.
After adding business profile, need to submit details to google for validating account.