Can I use Link My Books to upload sales from Shopify and Square to QBO? Is there any other app I can use - in Canada?

Check Synder

https://partnerstack.synder.com/quickbooks

Yes, Nerina, you can link it to your QuickBooks Online (QBO) company file for seamless transaction handling from Square and Shopify. We'll provide more details below to guide you through the process.

To begin, here’s how:

1. On the left navigational bar, go to the Apps tab.
2. Click Find apps.
3. In the Search bar, enter the name of the app you want to link to your QBO company.
4. Click on the application that shows in the results.
5. Once done, click the Get app now button.
6. Follow the on-screen instructions.

For visual reference, see this page:

If there's anything else that you need assistance with, please let us know in the comment section. Rest assured, our team is ready to assist you in resolving inquiries.