If you buy a single firearm buck license any buck with 3" antlers or larger is legal.
If you buy the combo license you then get one license for a buck with 3 or more points on one side and one license for 4 or more points on one side. Those are the minimum qualifications - for example you could take two 12 pointers, or one 10 point and one 8 point, etc, etc.
And they do not have to be taken in order - in other words you can take a 10 point first and tag it with the restricted license (4 or more points on one side) and later shoot another buck with 3 or more points on one side.