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,
https://taxpro.intuit.com
What is ProSeries and Lacerte?
https://ttlc.intuit.com/replies/3301784
https://ttlc.intuit.com/questions/1901004-what-is-proseries-what-is-lacerte
