The first thing to do is to remove carpeting and check the stairs for squeaks and make sure the stairs are flat.
How to do laminate flooring on stairs.
Alternatively you could cover the overhang with plywood to make it level.
You need to take care of the treads risers and stair noses which can get a bit complicated at times.
Things i mention in this vid.
Laminate flooring installation on stairs.
You have to ensure that there are no gaps and spaces in the flooring and it is complete and perfect in every way.
To install laminate flooring on stairs start by removing the overhang or the underside of the stairs with a jigsaw.
Watch how to install laminate flooring on stairs video.
Step 1 preration removing carpet creaky stairs if your stairs have and overhang this need to be removed or the space below the overhang needs to be filled in.
However installing laminate flooring on your stairs is a completely different matter.