Thank you for your prompt response. If I understand you correctly, we can fix the problem by creating a fictional service item for the amount of the invoice, deleting all the actual inventory items from the invoice. To clarify, the service item should be posted to the same sales account as the inventory items were? Do we need to make any other adjustments or journal entries? We operate on a cash basis, and are wondering whether this adjustment will affect our financial reports for tax purposes.
create the service item, I name it something like bal. fwd. sales and select an income account
edit the invoice, add the Bal. Fwd item on the next line for the same amount
then delete the line(s) with inventory items, save
Cash basis report on cash received as of the date received, so when those invoices get paid, yea that will increase cash basis income