To begin with, we'd like to know which amount you’re referring to that didn’t match between QuickBooks Online (QBO) and Shopify, @espen. Providing us with more details will help us understand the issue and offer you the right resolution.
In the meantime, you may want to check that, to properly integrate sales with QBO, all of your Shopify items are set up with unique SKUs. Also, please verify whether you have created your sales in QBO as sales invoices or sales receipts.
For more information about Shopify and QBO integration, please see this article for the global region: Shopify and QuickBooks Online Integration Guide.
You may also find the following resource helpful; be sure to review the important notes marked in red: https://support.onesaas.com/hc/en-us/articles/360020081451-Shopify-and-QuickBooks-Online-Integration...
Since QuickBooks relies solely on the data sent by Shopify, you can also contact Shopify support for assistance with discrepancy issues.
If you have any additional concerns, feel free to leave a message in the Community.
