It does if you convey the fact that something is already in a certain location. E.G
Под столом - under the table
But
If you convey the fact that something is not in a certain location yet but is being moved there or is going to be there you need the accusative case
под стол - is not under the table yet but where it should be
Положи это под стол - Put it under the table
Нашел это под столом - found it under the table
I hope this helps