I'm glad to see you posting here in the Community space. I can show you how to add information to your invoices in QuickBooks.
You can include custom fields to the sales invoices in the Online version. I recommend utilizing this feature to add the necessary info like the bank details.
Here's how:
Click the Gear icon in the upper-right corner.
Select Custom fields below Lists.
Add a custom field for the bank details.
Press the + New option and choose Invoice below Customers.