First, open Google pay on your smartphone.
On the new screen tap Bank transfer option.
Fill out the information.
Once you chose bank transfer, the screen will ask for the following details. (01)Recipient Name (02)Recipient account number and re-enter once again. (03)IFSC code
Enter Desired amount to pay.
Copy UTR / UPI Transaction ID and now you can use this UTR on website or wherever needed.