I have read ProConnect's instructions - and they say the below.
However - the steps given don't make sense.
There is no "adjustments to income" area on the "Deductions" screen. 
Help please 🙂 

Follow these steps if health insurance premiums were not reported on W-2:
Go to the Input Return tab.
From the left of the screen, select Deductions and choose Adjustments to Income.
From the top of the screen, select Health Insurance.
Enter the appropriate amount in Premiums not entered elsewhere (excluding long-term care).
Under the Long-term Care Premiums subsection, enter any applicable fields.
Scroll down to the Net Earnings (if multiple businesses) section.
Select 1 = Schedule K-1 (1120-S) in the Form (Click on arrow to select from list) dropdown menu.
Select the applicable activity in Activity name or number.
Enter the Net earnings [Adjust].
Go to the Check Return tab to view the Worksheets.
The program will generate a worksheet to calculate the Self-Employed Health Insurance Deduction.
The deductible amount will flow to Form 1040, line 29.