How to create prefill links in bulk?
Open your form in Google Forms
Install the Formprefill addon (click here)
Click on the addon icon
Click Formprefill
Click Create prefill links
Click Proceed
Share page will open in a new tab
Click on the three dots ⋮ More icon
Click Export to Sheets
Google Sheets will open in a new tab
Enter the id, email and name for all the customers
Click Extensions
Click Formprefill
Click Save prefill links
Select the form(s) and click Next
Verify and click Sync now
Formprefill automatically generates new prefill links based on the data entered in Google Sheets. The generated prefill links will be displayed in the Formprefill Share page.