Here is the answer for everyone, after spending an hour on the phone with support and being incorrectly told I need to upgrade to Premier version for this feature:
Schedule C businesses - when adding your schedule K1 to TT, select box 20, then continue, then select code Z and enter your qualified business income (not the deduction amount). then it will automatically calculate for you.
S Corp businesses, select Box 17 and choose letter V and follow same as above.
it was very simple once you knew what look for. unfortunately TT does not automatically ask you to check for this potential deduction and that is a flaw in the program.
