A portion of an item a father is entitled to when he buys something for his kids, usually something they pestered him to purchase or if they ask for his assistance to open the packaging. This is normally applicable for food items.

When you eat dirt for the first time and leave your family to build a shack in the woods

A portion of any item received by any household member that the Dad is entitled to. Most often applied to food and drink items. Applies to items given to or purchased by any household member as a contribution for all the wonderful things that a Dad does for the household without recognition or reward. The tax is applied entirely at the descretion of the Dad and can be used at home, in the car, at the shops, at friends houses, or anywhere else in the known and unknown galaxy.

A portion of any item received by any household member that the Dad is entitled to. Most often applied to food and drink items. Applies to items given to or purchased by any household member as a contribution for all the wonderful things that a Dad does for the household without recognition or reward. The tax is applied entirely at the descretion of the Dad and can be used at home, in the car, at the shops, at friends houses, or anywhere else in the known and unknown galaxy.

Aka, "child support". A long-term and generally hefty tax created by the ultra rich in an attempt to keep men in western world from breeding.

A form of birth control passed off under the guise of "taking care of 'their' kids" (which is funny as many dadtaxee don't even get to see their offspring much less have possession of them).

The way it works is simple: Offer mom lots of free money (taken from dad) to do nothing other than "keep" kids away from dad. That is fitting as dad is forced to work most of the time using the threat of jail and the corresponding rapes/violence as incentive.
It's pretty clear cut, dad 'must' work to pay mom/lawyers/judges/social workers/psychologists and the rest of those who live from "family" (more like destroying families) courts. If he doesn't pay/work, "they" will take everything he has and throw him in a cage.
Those Nazi tactics sure make fatherhood look like a nightmare and that is the point, convince men not to have kids.