Are you using QuickBooks Self Employed? QBSE?.
Unfortunately A2X is unable to support QuickBooks Self Employed due to the API's not currently being available to third parties.
In recent correspondence from Intuit Developer Relations we are advised that, 'the QBSE API's are not publicly available currently'.
We are working closely with the Intuit development team and we hope to have further updates regarding QBO Self Employed (QBSE) in the near future.