Hi there, Vishal.  If your reference number appears greyed out, it's probably because the Print Later option has been selected. To resolve this, let's simply uncheck the Print Later option, which will remove the To Print status from your reference number and ensure it updates correctly.

Here's how:

1. Go to + New.
2. Under the Vendors column, click on Pay Bills.
3. Fill in the Payment Account and Payment Date.
4. Then tick the box for the Print Later option.

If you need to to modify your reference number for your vendors, you can follow the steps provided by my colleague, @Rea_M. 

Once you've successfully updated the reference number, you can proceed to pay your bills.

Feel free to reach out to us if you have any further concerns. We're here to help you!