You can now write-off the remaining amount to 0 after doing insurance payment.

Navigate to Transaction:

Then click on the Credit Transaction >> Paid By Insurance link:

A pop-up will then appear and the user can enter the patient number or name. 

Once the patient is selected then it will redirect to the "Paid by Insurance". Then you can post the insurance payment against charges and then click submit to post insurance payment:

Then a pop-up will appear having the option to "W/O remaining amount to $0.00". This option will automatically write off the remaining amount against the charges which had insurance payment posted in the earlier step:

Remaining amount get posted as Insurance write-off and balance is 0: