Hi there, Carel12345.

Let me add some information about importing products and services into QuickBooks Online.

When importing products and services services data, you'll have the option to select Overwrite all values for each product or service with the same name. But, make sure to everything is correct this can't be undone.

You can check out this article for more information in importing products and services into QuickBooks Online.

I'm also adding this link that you can use as a reference: Acceptable characters in QuickBooks Online.

Get back to me if you still need further assistance about importing data. I'm always here to help. Have a good one!