In GoldFinch, it is possible to post to a GL Account directly without creating a service item first.
On Company Setup, check Enable GL Account on Invoice.
The GL Account column will appear on the Purchase Invoice Edit page and Sales Invoice Edit page.
You can only select either Item or GL Account on the invoice line.
If you want to post to GL Accounts, don’t select the following control GL Accounts defined on the Company Setup. You will not be allowed to post.
Account Finished Good Inventory
Account Subassembly Inventory
Account Raw Material Inventory