Hello accounts233,
Welcome to the Community.
Statement templates run from the Master invoice template, so you will need to add you bank details to that.
You can add banking details to your invoices/statements by adding custom fields, headers or footers to the invoice.
Here’s how to add the fields:
Click on the Gear icon > Custom Form Styles (under the Settings heading)
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 Next to stay with the one you have.
Select Footer and add a customer message with the banking details or add the banking details in as a footer, click Save.
Note: The change will only apply to newly created invoices after the invoice customisation was applied.
Thanks ^Becky
