Hello, Glenfield.
I'll add something to the mix about QuickBooks Online's key differences on different countries.
There are significant key differences in using the US and the European versions of QuickBooks Online.
For example, the payroll module might not be offered in the European versions. The sales taxes are different, depending on which country you signed up for.
Plus, the user interface might be different (the languages and terminologies used).
So, you might need to use specific API links for third-party apps.
To elaborate more on the API link, are you trying to connect a specific app with either the US or a European version?
The links might be different, depending on the app's accessibility for all QuickBooks Online versions.
I would recommend contacting the app's support channel to see if they support a connection for specific QBO versions.
If you're trying to develop an app and want to connect it for QuickBooks Online, you'll want to contact our Developers support. You can ask them about the basic API links that work for European or US versions.
Go to this link to reach out to them: https://help.developer.intuit.com/s/contactsupport (you might need to login).
If you need to learn the ropes in QuickBooks Online, we offer several tutorial videos for you to watch. Video tutorials for QuickBooks Online.
Do you have more questions for QuickBooks Online and its features? Please let me know the details below and I'd be glad to barge in again with helpful details.
