Fortnox error: 2003977

Description

The integration could not post the invoice in Fortnox. The reason is that one or more invoice lines have quantity > 0 but are missing a description (line text) or an item number. Fortnox requires every billable line to be complete in order to be posted. The message also indicates that the customer was not found and was therefore created/will be created, but the main error concerns the line information.

Cause

• At least one invoice line with quantity > 0 is missing a Description (line text) or item number.

• The item being used lacks a linked default account in Fortnox.

• The line is a comment line that incorrectly has quantity > 0.

• Incorrect or incomplete default accounts/account settings in the integration or in Fortnox.

Resolution

• Open the invoice in Fortnox and review all lines with quantity > 0.

• For each such line, enter a description (line text) or an item number.

• If the line is informational only: set quantity = 0 or mark it as a comment line without charge.

• Ensure that items in Fortnox have the correct linked sales accounts (default account per item/item accounting).

• Check the integration’s account settings.

• Verify that the customer was created correctly (since the customer was initially missing) and that the required customer fields are filled in.

• Try posting the invoice again.