Locate your Settings icon in the top right corner of QuickBooks:

Choose Account and Settings from the menu: 

Click on Advanced Settings and then on the Edit icon to the right of the Categories section:

Check the box next to 'Track classes' to turn them on and click on Save:

Go back to the Settings Icon and choose 'All lists' in the menu:

Then, click on Classes:

Add your marketplaces one at a time by clicking on the green New button in the top right corner:

When you are done creating classes for your marketplaces, refresh QuickBooks cache in A2X:

After you've refreshed your cache, your classes will be available in Settings > Invoices. You will see them in the drop-down list:

Click on Update Invoice Settings, any our transactions will be classed by the marketplace they are from when you send the settlements over to QuickBooks Online.  You can now run Profit & Loss Statements by marketplace.

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