There are a number of ways that you can sell a package to a patient. If you wish to add it via their profile, you can select the Patient > Add Invoice. From here, you can select the package you want to charge with the search bar at the top of the quick bill window.
Selling through Invoice
If this way does not suit and you wish to add a package to their account without invoicing the package, (as they could have prepaid for this). You can select the Patient > Finances > Prepaid Items and can add it manually through this option.
Manually add Package
If you wish to bill this and add a package once they have attended the class, you can bill a new package once they have attended the class or before the class. If you select "Pay" within the class on the patient you want to bill, there will be an option that appears below regarding bill new package. This will only show packages that are related to this class and once selected, it will create an invoice for them to pay for this package.