I own a business and do income taxes for small businesses as well as for people and was wondering out of these 5 programs which would be best?

[Critter]

NONE of the Turbo Tax programs can be used by paid tax preparers ... you must use a professional program. If you don't know this then you need to get educated before you start accepting money for preparing returns... failure to comply with IRS regulations are costly.

Intuit (the company that makes TurboTax) has three tax software product lines for paid preparers: ProSeries, Lacerte, and Intuit Tax Online. Here are links to their web sites.

http://proseries.intuit.com
http://lacerte.intuit.com
http://accountants.intuit.com/tax/online/

For a new preparer just starting out, ProSeries Basic is probably the most suitable.

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... 

FAQ for Tax Preparer Requirements
http://www.irs.gov/Tax-Professionals/Requirements-for-Tax-Return-Preparers:-Frequently-Asked-Questio... 

Do you need a PTIN (Preparer Tax Identification Number)?
http://www.irs.gov/Tax-Professionals/Frequently-Asked-Questions:-Do-I-Need-a-PTIN%3F

[SweetieJean]

Also see:
<a rel="nofollow" target="_blank" href="https://www.irs.gov/tax-professionals/overview-of-tax-return-preparer-requirements">https://www.irs....>
In addition, some states require that tax preparers be licensed.