You can not use Turbo Tax Online versions or the personal Desktop Software to prepare returns for clients. Intuit has other products for tax preparers. They are Lacerte and ProSeries and ProConnect. ProSeries is the least expensive. You can install ProSeries and Turbo Tax on the same computer.
Intuit Products for Tax Professionals,
https://proconnect.intuit.com/tax-software
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...
Do you need a PTIN (Preparer Tax Identification Number)?
http://www.irs.gov/Tax-Professionals/Frequently-Asked-Questions:-Do-I-Need-a-PTIN%3F
OR do you just want to have a link to Turbo Tax on your own website for you customers to do it themselves?
