I'd be glad to help you with your invoice concern.
By adding custom fields, headers, and footers to your invoices, you can include banking information. The change, however, will only apply to newly created invoices after the invoice customization has been made.
Log in to your QuickBooks Online account and click the Settings icon and then select Custom Form Styles.
Locate the Standard style and select Edit on the right-hand side of the column.
On the style page, you can select a new style or click the Next to stay with the one you have.
Select Footer and add a custom message with the banking details or add the banking details in as a footer, select Save.