SI's integration with QuickBooks Online (QBO) allows you to create estimates and purchase orders in QBO directly from your SI projects. You can also create items in your QuickBooks database directly from your SI catalog of items.
Click here for information about supported QBO versions.
1/ In QuickBooks Settings, choose QuickBooks Online and click the Add button to add the QBO company file URL to SI.
2/ In the Connect to QuickBooks Online form, click the Connect with QuickBooks Online in browser link.
3/ In the new browser tab that opens, log into QBO and select a company.
4/ You will now see the page with the URL that includes the company information. Copy the URL in the address bar.
5/ Paste the URL in the Paste URL text box and set a display name for the company in the Display Name text box.
6/ Click OK. You will see the QuickBooks Online company in the table.
7/ Configure the rest of your QuickBooks settings.
Check out this article on configuring QuickBooks settings for more details.