Hi Emma63, thanks for reaching out to the Community

With location tracking in QuickBooks Online you can track multiple locations such as offices, regions, outlets, or departments of the same company. Please note, this feature is only available for QuickBooks Online Plus (where you can have up to 40 classes and locations combined) and Advanced (unlimited). 

@Emma63 

If you run a retailer or wholesaler, you can use a 3rd party inventory management app with multi warehouse feature to integrate with QBO.

I want to track multiply locations on one bill - is this possible?

Hi Emma63, locations are set at a transaction-level and so it would only be possible to assign one location per bill.