In the invoice form setup, the user not able to select any remittance slip as there is no field is available.
This is because, the preference ‘Print remittance form with invoices and statements’ is not enabled in the account.
Navigate to Setup -> Company -> Preferences -> Printing & Fax.
Under the printing tab enable the preference – Print remittance form with invoices and statements.
Then a remittance form will be included on invoices and statements.
The remittance form details payment information the customer needs to make a payment, including the invoice number or statement amount due, the name to make checks payable to and the address to mail the payment to.