Most often you will have carpet on your stairs and you need to remove it first.
Installing laminate flooring on stairs.
Alternatively you could cover the overhang with plywood to make it level.
Things i mention in this vid.
The difference is usually the stair noses.
Step 1 remove carpet and tackstrip.
You have to ensure that there are no gaps and spaces in the flooring and it is complete and perfect in every way.
Installing laminate flooring on stairs can be tedious and time consuming and is a lot different than installing laminate flooring on a floor.
To install laminate flooring on stairs start by removing the overhang or the underside of the stairs with a jigsaw.
Hardwood stair uses the tongue and groove system making the stair nose flush with the hardwood on each stair.
However installing laminate flooring on your stairs is a completely different matter.
Installing hardwood flooring is basically the same as installing laminate flooring on stairs.
You need to take care of the treads risers and stair noses which can get a bit complicated at times.
Once this is done measure and cut out your pieces of laminate to make tread pieces riser pieces and stair nosing.
Watch how to install laminate flooring on stairs video.
Laminate stair noses are mostly the lapping type.