I have the same issue. Recently upgraded to Reckon Accounts 14 and the BAS fails on prefill. SBR has been selected. Any other suggestions?
This issue may occur where the user submitting the BAS/IAS to GovConnect is not the person that prepared the BAS/IAS. The qbEAS.xml file is saved to the user’s personal directory: C:\Users\<logged in user>\My Documents, and is created when the option Lodge is selected when completing the BAS/IAS. If another user will be uploading the BAS/IAS to GovConnect then that user will not have access to the first user’s personal directory for the export file qbEAS.xml.
If this is your situation then you could open the company file and click on Lodge. Â
Otherwise, the preparer of the return will need to get the qbEAS.xml to the submitting user - save the qbEAS.xml to a shared folder or email the submitter who can then transfer the file to their personal directory  C:\Users\<logged in user>\My Documents.
Hope this helps. Â
regards,
John.