Hello there, @MP2.

I'd be glad to assist you with printing a remittance advice slip for a cheque payment to your supplier.

At this time, QuickBooks Online is unable to print remittance advice. What you can do is print a report that will list all the bills and bill payment checks. Then, you can print or email it to the vendor. Here's how:

1. Choose Reports in the left menu.
2. Enter in the transaction list by the vendor in the Go To Report field.
3. Set the Report Period.
4. Click on the Customize button.
5. Select Filter.
6. For the Transaction Type, make sure to add Bill and Bill Payment (Check).
7. You can add and remove columns by clicking Rows/Column.
8. Click on Run Report.

Once you have completed those steps, you can also save the report so you can access it the next time you need it. Just click the Save Customization button.

Here is a detailed article with some additional information about remittance advice as well: Remittance Advice in QuickBooks

Please let me know if the steps above do the trick. Thank you for reaching out to the Community. Happy Wednesday!