Multiple Quick Book Online accounts can be used.
When exporting a batch to Quick Books Online, the export dialog will prompt for the Quick book On Line account that should be used. This allows a customer to have separate Quick Book accounts per store.
Authorization for QuickBooks Online accounts is now in the QBO Inferface Settings form. When you first visit the page, enter in your QBO Company ID, click save.
First Log into IMERCHANT
Click TOOLS / OPTIONS from the top menu.

Then click ACCOUNTING INTEGRATION Tab
Click on the CHECK BOX next to ‘Use Quick Books API with these settings’
Next click the BINOCOLARS
If you have already setup these settings, you will see a record in the search results (Highlight it and click Properties) otherwise click NEW to create new Quick Books Online Authorization Settings.
Next fill out the following boxes:
Code: QBOAPI
Description: Quick Books Online Export Settings (Or something similar)
Quick Book Company ID: YOUR FULL QUICK BOOKS ONLINE COMPANY ID (SEE GET QUICKBOOKS ONLINE COMPANY ID)
Click SAVE, then go back and Authorize your QBO account.
Once you initially save your QBO Company ID, you don't need to resave each time you leave or use the authorize button. Only resave if you have changed your description or the company id.
Next click "AUTHORIZE" to open a local web browser and authorize your QBO account.
Once your web browser opens, log in with the credentials matching the Company ID you entered above.
After you close your browser, you will see a GREEN button saying "FINALIZE SETUP". Click once to complete.
Then you will see the "READY FOR EXPORTING" gray button if authorization is complete.
Then when you go back to export data from the ACCOUNTING EXPORT, you will be asked to pick which corresponding account you are exporting data for. Select the QBO Account and click "USE TO EXPORT"
If you receive an authorization error when exporting to QBO. Use the "CLEAR AUTHORIZATION" button in the QBO settings form to clear your settings and restart the authorization steps. Make sure you are authorizing to the correct QBO account and try your export again after completing the steps above.