Hi @MikeMakesWhisky,

Let's see if we can figure this out.  If tracking the COGS to an Assembly, the Assembly item in QBPOS should have accounts listed.When the item has a Average Unit Cost in QBPOS, and is sold, the Cost would move from the Asset account to the COGS account, assuming they are different accounts.

Let's try this:

• Navigate to Sales History
• Locate and highlight the Sales Receipt which included the sale of the Assembly Item
• Open the "I Want To..." menu
• select Show Financial Detail

This should reflect the receipt in QuickBooks Desktop and the Journal Entry associate to COGS for that sale.  Then you can work backwards to locate the COGS amount specific to the Service Item and make another Journal Entry to debit the impacted COGS account and Credit whatever account you are using to track your payouts to the Vendor.

If you run into trouble, I would suggest reaching out to Point of Sale support so they can walk through this with you.  The link below will provide you with the contact options for the Point of Sale team:

Contact Support

Point of Sale is the first option in the article on that link.  Hope that helps!