The default due date is based on the number of days after the invoice date. You can change it on individual invoices if needed.

1. Go to the Settings page.
2. Select Customise invoices. 
3. Make sure you're on the Default details tab. 
4. In the Default due date section, use the dropdown menu to select the number of days past the invoicing date.
5. In the Bank account section, use the dropdown to set an active bank account as your default payment method.
6. Use the bank account details that pull through from the selected bank account, or edit the details to change them. 
    NOTE: Changes you make here directly update your bank account record.
7. Use the Payment instructions section to set default payment terms or alternative payment instructions.
8. In the Note section, set a default message for your customers. You can change this on each invoice as needed.
9. Once you're happy with your changes, select Save.