On the TT "Your final numbers" screen, which line(s) on the 1040 correspond to the "Federal deductions" amount? At least for 2019, it is not equal to 9, 10, or 11a.

Once again they changed the format on the 1040 forms so they will not line up line for line between 18 to 19  or 19 to 20.  Look  at what the line functions are and not just the line numbers themselves ...