Hassume-
A flex spending account offers an elective pre-tax contribution to an account for may things such as insurance and child care expense. In general, you don’t see a flex account used for insurance premiums, but for out of pocket costs associated to the insurance, such as copay and deductibles. Typically pre-tax premiums are due the the employer establishing a section 125 plan that allows for their share of insurance to be tax exempt. Daycare is also separate, but inclusive, of a flex plan. There is an annual limit of $5,000 than can be utilized in a flex for daycare, and shows on the w2, as this also impacts the amount that applies for purposes of daycare credit on the tax return.
Since a flex account is on a pre-tax basis, the real savings to the individual is both the income tax rates, as well as savings on social security and Medicare paid in from the employee share. This is 7.65% up to the SS wage base limit, and no limit on the Medicare portion. To answer your question in that regard, it will really depend on the total wages, however, since these are elective contributions to a flex plan, it does not change the gross figure for determining support as far as I’m aware, but I do believe this is a consideration for any tax adjustment impact if this becomes a matter, but can honestly get difficult to figure.
I would also assume that since Kansas looks at time spent with each parent for purposes of determining any adjustment, that may be part of the reason for not wanting to allow you to have time during the day, as my guess is this helps limit the time adjustment impact. Just my opinion from looking at this from the outside.