This error is because the invoice does not have the correct nominal accounts on one or more of the lines, or on the header. Sales invoices will normally credit a sales account, optionally credit a VAT, GST or Sales Tax account, and debit an accounts receivable account. The account receivables account is specified on the header tab. The other accounts are on the line details tab. All lines must be correct.
- You can review the accounts being used on the Bookkeeping tab. As accountancy rules state, the sum of debits and credits must be the same, and this can give you a clue as to what is wrong or missing.
- Check that there is at least one receivable account in your system. You can see it on the invoice header: "Receive to Account". The drop down list must have at least one value. If there is only one value the system will select it by default when the invoice is activated. If there is more than one you will need to select one. The default can set on the partner card.
- Check that every line has a sales account on the line details tab.
- Each sales account will have a default tax code. Make sure that there is the appropriate tax code available and selected.
- If your customer is in the same country as yours and you have VAT, GST or Sales tax, check that every line has a VAT or GST payable account.
- If there are no entries in the dropdown lists for an account, go to admin - system settings - accounts, search for the correct account and mark it for its use. If the account is not in system settings, you will need to import it from your linked accountancy system using the bookkeeping connection screen. If you are unsure which is the correct account or tax code, you need to seek the advise of your accountant.