Go to the OIS Connect website (Click on the link below):
Enter the User Name and Password (Provided separately in an email) and click on the “SIGN IN” button.
Click on the “Connect to QuickBooks” button.
Enter the QuickBooks Online user’s credentials and click on the Sign-In button.
Click on the “Connect” button.
Once connected; it will display this website page and the message stating that it is Connected:
Message displaying that OIS Connect is connected to QuickBooks Online: