Welcome back to the QuickBooks Community, MurphyBoot. I'll walk you through the step-by-step process to ensure you connect Shopify to QuickBooks Online smoothly.

When syncing the two software, you'll have to go to the Apps menu in QuickBooks. This will redirect you to the Connections tab in QuickBooks Connector (OneSaas) to finish integrating the app with QBO.

Here's how:

1. Sign in to your QuickBooks Online account.
2. Go to the Apps menu at the left panel and find and install Shopify Connector by Intuit.
3. Choose Connect. Then, you'll be redirected to the Connections tab in QuickBooks Connector (OneSaas). Select Connect to Shopify.
4. A new page will pop up on your screen and it will ask you to enter the domain URL. Once done, choose Connect to Shopify.
5. Sign in to your Shopify store.

After that, your Shopify account is now connected and authorized with your QuickBooks Connector file.

If you run into an error or see any unusual behavior throughout the integration process, I recommend contacting the Shopify Support Team. They can provide you with more specific instructions on how to connect the two programs and how their procedures work. Also, please know that imported data in QuickBooks Online depends on what 3rd party app shares with us and how they're posted.

Lastly, refer to this article if you need steps on how to disconnect installed apps in QuickBooks that you no longer use: Disconnect an app and change subscription.

Please don't hesitate to leave a comment if you have further concerns about connecting Shopify to our program. I'm just around if you need extra assistance, MurphyBoot. Have a good day!

@MurphyBoot 

You need a 3rd party app as the connector.

Try Synder to connect Shopify to qbo. It helped me a lot and as far as I know their support is very fast and experienced so if you have any problems you can contact them for help. Definitely worth a try.

I agree. Synder is not cheap but very reliable.

https://partnerstack.synder.com/quickbooks