Account for funds rx on an Invoice for "Grants Account" versus considering it for the "Sales Account"?

Account for funds rx on an Invoice for "Grants Account" versus considering it for the "Sales Account"?

Our organization has been awarded a governmental grant - and they require an invoice to process. Zoho has an amazingly bright invoice format and this worked for their purposed. However, when I go to accept the payment and match the funds to the invoice - I do not want to account for the monies as "Sales", which it seems to default to, but instead to another Income account I have created in our chart of accounts for "Grants". Is there a way to change which Income account an invoice credits?