Can I import a tax return prepared by a professional?

[JohnW152]

Maybe.  Since you indicate that you're using TurboTax Online, see the TurboTax Help article How do I transfer last year's return into TurboTax Online? for guidance.

If you're using the desktop version, see the TurboTax Help articles How do I troubleshoot copying info from a prior-year return in TurboTax Desktop? and Transfer last year's return to TurboTax Desktop for Windows for prior-year transfer guidance.