You cannot add your banking details on the statement that is sent out to customer. Poor?

Thanks for visiting the Community today, @info1502.

As an insight, adding bank details isn't currently unavailable in QuickBooks. However, you can customise and add the bank details to the invoice template instead. 

Here's how:

1. Go to the Settings menu (⚙) at the top right.
2. Select Custom Form Styles, then click Edit beside the Standard form style.
3. Click Content., then click the Pencil (edit) icon in the last section.
4. Enter the bank account details either in the Message to customer or Footer text box.
5. Click Done.

I've got you some of our resources below that can help you learn more about customising sales forms in QuickBooks. It teaches you to add any details to your template as well as how to design it:

• Create and view customer statements
• Customise invoices, quotes, and sales receipts in QuickBooks Online

Don't hesitate to leave a reply below if you need additional assistance. I'm always around here to help.