Step One: Select Quickbooks in Merge Link
In Merge Link, select Accounting -> Quickbooks.
Step Two: Connect your production or sandbox account
Select whether you want to link a production Quickbooks account or a sandbox account. Click Continue.
Step Three: Authorize your Quickbooks account
A new window should open allowing you to enter your Quickbooks credentials to authenticate. Enter the username and password you use to sign in to Quickbooks.
Step Four: Complete the connection
The window should close and you will be redirected to Merge Link showing a successful connection!