Alternatively you could cover the overhang with plywood to make it level.
How to install laminate flooring on stairs.
Things i mention in this vid.
Once this is done measure and cut out your pieces of laminate to make tread pieces riser pieces and stair nosing.
To install laminate flooring on stairs start by removing the overhang or the underside of the stairs with a jigsaw.
You have to ensure that there are no gaps and spaces in the flooring and it is complete and perfect in every way.
It can have tack strip and a lot of staples.
Laminate flooring installation on stairs.
Watch how to install laminate flooring on stairs video.
However installing laminate flooring on your stairs is a completely different matter.
Woodwise stair jig scribe http amzn to 2swvftk subscribe for more.
You need to take care of the treads risers and stair noses which can get a bit complicated at times.