To prepare a 1041 return, you need to buy Turbo Tax Business Desktop program, not to be confused with the personal Home & Business version. Home & Business is just for personal returns that need schedule C for self employment. TT Business is not available to do online or on a Mac. You can buy the Windows Desktop program here. I don't know if you can get Assisted for 1041 returns.
https://turbotax.intuit.com/small-business-taxes/cd-download
Window System Requirements
https://ttlc.intuit.com/community/system-requirements/help/minimum-system-requirements-for-turbotax-...
