This is from memory, but...
Go to main menu
Go to Maintenence menu (M2?)
Choose prescription maintenance
Choose prescription maintenance again
Put in the RX number
Then...I forget
You choose a fill number somehow
Then one of the options shows every time an Rx was billed
When you choose the most recent billing you can choose an option to see the third party response data
Hit enter twice to get to the third screen of data
There you can sometimes see the amount of copay, coinsurance, and deductible included in the patient pay amount.