If it's a floating laminate floor (i.e. it isn't glued to the floor, but just rests on a foam underlay or padding) then you shouldn't attach the flooring to the walls at any point. You can cover the spaces around the edges of the walls with baseboard, but this should just rest on the floor, not be connected to it in any way. This is because a floating floor may expand, contract, or shift slightly due to changes in temperature or humidity, and if it's attached at any point the laminate flooring pieces may separate due to the strain.
When I put my flooring down, there were gaps around the fireplace and near the door leading outside, so I simply used some tinted caulk to fill the gaps. You can usually find caulk tinted to match different wood colors, so it should blend with the floor easily. And since the caulk will expand and contract a bit, it works fine with a floating floor.