No, you cannot upgrade from Premium to Business.
The TurboTax Business Edition is a standalone edition to be installed on a Windows based personal computer. The edition supports Form 1065 for Partnerships, Form 1120 for C Corporations, form 1120-S for S Corporation and Form 1041 for Estates and Trusts.
Go to this TurboTax website for the 2024 Business Edition - https://turbotax.intuit.com/small-business-taxes/cd-download/
