here are several advanced settings in the package editor.
Under the accounting tab, you can set a ledger code for the package, as well as specific prices and costs with options for editing the VAT.
Under the automations tab, if you have automations set up on your TM3 account, you are able to enable automations to send out reminders to patients who are nearing the end of their package/expiration date.
In the Advanced Options tab, there are the options to either limit the package to one per customer, meaning that the package is a one off deal, or to limit the package as a new customer deal.