Nice to have you in the Community space, @mattymoo.
I'll make sure you'll be able to view your COGS in your December Profit and Loss reports.
To start with, you'll want to ensure you modify the report correctly by ensuring to select either the Cash and Accrual accounting method.
If this is not the case, I recommend contacting the CIN7 support team to verify any updates on their end. There's a great chance there having a system update that causes some data to be inaccessible on your end.
Once everything is all set, you might want to check out this link for guidance on how to modify and access your reports outside QuickBooks Online (QBO):
In case you need more assistance managing your reports or with your QBO account, you can always count on me. I'll be here to help you anytime. Have a good one and happy holidays!
