How can I claim the domestic partner dependency income cap exemption detailed in Q12 of https://tinyurl.com/39k99r6u?

Tl;dr, the answer suggests that domestic partners CAN be marked as dependents EVEN IF their income is over the $5,050 maximum, specifically "Unlike the requirements for section 152(d) (dependency deduction for a qualifying relative), section 105(b) does not require that Partner A's gross income be less than the exemption amount in order for Partner A to qualify as a dependent." How can I go about claiming a dependent who makes over 5,050 in turbotax online?