Turbo Tax will figure it all out for you. Don't worry about it. Here's some other info on it.
The IRS released the Final Regulations that clarified that
(1) the 1/2 SE tax deduction,
(2) Self Employed Health Insurance deduction, and
(3) employer retirement contributions
need to be subtracted from your business profit to determine "Qualified Business Income" (QBI) for the 20% deduction.
