Then to efile more than 5 returns you need to be using a professional program. Intuit has 2 products for tax preparers. They are Lacerte and ProSeries. ProSeries is the least expensive. You can install ProSeries and Turbo Tax on the same computer.
Intuit Products for Tax Professionals,
Professional Tax Preparation Software (Online & Desktop) | Intuit Accountants
And to prepare more than five e-files, you will need to sign up with the IRS as an ERO - an Electronic Returns Originator. How to become an Authorized E-file Provider…..
http://www.irs.gov/Tax-Professionals/e-File-Providers-&-Partners/Become-an-Authorized-e-file-Provide...
