To get started, go to Store and Files from the left-hand menu, open the Accounting Files tab, and click Add Accounting in the top right corner. Choose QuickBooks, then click Connect to QuickBooks.
You’ll be prompted to log in to your QuickBooks account and authorize access. Once you’ve approved it, your QuickBooks account will be successfully connected to ConnectBooks.
Next, go to the Stores tab and select the store you want to connect to QuickBooks, next to Accounting Application, click Connect, then choose QuickBooks.
You’ll see the QuickBooks file you just connected — select it, then click Continue.
Your store is now connected to QuickBooks, To view the article on configuring your store settings and chart of accounts click here.
Note: To ensure smooth syncing to QuickBooks Online, go to "Accounts and Settings" in your QuickBooks file, and click on "Advanced" (the lowest tab on the left). In the "Automation" section, turn off "Automatically apply credits" if it's not already off.