To edit a membership package, click on the package you would like to edit and click on the 'Member options' then in the drop down select 'Edit package'. You can also edit the package by clicking on the grey 'Edit Package' button underneath the name of the package.
You can edit all the details of the package, apart from the type and category if you already have members in the package.
The cost of the package can be edited, which will be useful when waiting to adjust the price throughout the year. After you've edited the cost, any member joining from that point will pay the new price.