hi when setting up suppliers the option to add their bank details is not showing how can i turn this on

Currently, adding suppliers' bank details is unavailable, Cormac2. As a workaround, you can add the bank details in the Notes or Other tab.

Here’s how to add a supplier's bank details:

1. Go to Expenses.
2. Select Suppliers.
3. Choose the supplier whose bank details you want to add.
4. Click Edit.
5. Enter the supplier's bank details in the Other section or in the Notes and attachments.
6. Click Save.

Also, I'm adding this reference to get insights about tracking bills:Enter and manage bills and bill payments in QuickBooks Online.
 

Please let us know if you have any further questions about managing suppliers' bank details. We’re here to assist you at any time.