My CPA uses the "professional" version of Turbotax. Can I import that tax file into my version, as a foundation for the following year's taxes? Thanks, Luis

Sorry, no.  The tax data file from the Intuit Professional editions cannot be transferred to the TurboTax Personal editions.

There is no professional version of TurboTax. Your CPA used professional tax software made by the same company that makes TurboTax. That company, Intuit, makes three different professional products.