Hi hvernon,

Welcome to the community family! It's great you're using Squarespace and want to integrate it with QuickBooks Online. QuickBooks makes it easy for you to connect third-party apps in the program so you can bring all your data together. I'll be happy to guide you with this.

To synchronize an app with QuickBooks Online is a pretty straightforward process.

1. Go to the Apps menu and choose the My Apps tab.
2. Search for the app you're interested in.
3. Select the app, then Get app now.
4. Review the Authorization page and select Connect.

And that's it! 

I hope this helps. Feel free to stop by if you need anything else.

@hvernon 

If you are a wholesaler, you may utilize an inventory management app as the connector.

https://go.tradegecko.com/register?code=fiat-lux

You may compare it to other connectors

https://automate.io?ref=quickbooks

https://www.integromat.com/?pc=quickbooks