The payment that you got from Amazon actually represents three things:
How much you sold - $10,000
How much you were charged to sell - $2,000
How much you were paid - $8,000
It will work better to enter the payment in Odoo after you enter the Sales and the Charges/Expenses as two separate documents - a Customer Invoice for $10,000 and a Vendor Bill for $2,000.
You can then leverage the standard workflows for paying them and the standard reports will "just work".
Since the $2,000 that you were charged by Amazon has already been 'paid' because they deducted $2,000 from your Sales, you will need to manually journal a 'payment', running through the bank, that nets the AP you would have owed them with the AR they would have owed you - had they not taken it already.
Note: right click the images below and select VIEW IMAGE or OPEN IMAGE IN NEW TAB to see a larger version
1. Create a Customer Invoice for the full amount - $10,000 - of Sales:
2. Create a Vendor Bill for the amount - $2,000 - of the Expenses:
Note: You will have to make sure the VENDOR box on the Amazon partner record
is checked, so that they are setup as both a Customer and a Vendor.
3. Pay the Customer Invoice for the amount - $8,000 - you got from Amazon:
4. Create a Manual Journal Entry that will net the $2,000 you owe Amazon with the $2,000 Amazon owes you (which they have already addressed by deducting the expenses from your sales in the payment they sent):
5. Use this 'payment' to mark the Vendor Bill as 'paid'.
6. Use this 'payment' to mark the Customer Invoice as 'paid':
The Profit and Loss / Income Statement (cash OR accrual based) will now look like this:
The Balance Sheet (cash OR accrual based) will now look like this:
