Ask the client to re-export the invoice after 1 minute when they get this error. This is a temporary fix while working on a permanent solution.
The TaxType code ‘OUTPUT' cannot be used with the account code '<code>’.
The account code used is not the registered revenue/income code in their Xero settings. Possibly, it is for Expense only.
Inform the client to use the account code registered as revenue/income in their Xero settings and not the expense code.
Unable to export to Xero / Export invoice button is missing / Export status column shows “NONE”
Company profile has not been configured correctly
Ensure the desired accounting integration is enabled under the Integrations tab (Xero/MYOB/Quickbooks)
Ensure the correct integration is selected under the “Export to” field under the Timesheet settings (Agency settings if exporting agency to host invoices and Admin settings if exporting admin to host invoices)
An existing Invoice with the specified Type and InvoiceID could not be found
The RCTI/Invoice has already been exported, but the client deleted it in Xero and tried to re-export it.
Remove the value from ExternalID in the DB.
Unable to export an invoice to Xero due to ValidationErrors:
There is a negative value in the Unit or Quantity column on the affected invoice.
Update the Unit or Quantity to a positive value, then update the rate to reflect the negative amount.