If you encounter an error which indicates that there was a problem connecting to QuickBooks, or that you do not have permission to connect to QuickBooks, you may need to change your QuickBooks settings. Here's how:
Start by launching QuickBooks.
Now, click Edit, and select Preferences.
Find and click the Integrated Applications icon in the panel on the left, then select the Company Preferences tab at the top of the screen.
Find a la mode Interface or a la mode TOTAL QuickBooks App. in the list of Application Names. Select it, then click Properties to open the details for the entry.
In the screen that appears, check the Allow this application to read and modify this company file and Allow this application to login automatically boxes.
Finally, click OK on all open windows to save your changes.
That's it! After verifying that the two checkboxes above are checked, TOTAL is once again able to write data to QuickBooks.