If it truly is smudged, a drop (only a drop) of lens cleaner on some lens tissue or a fresh microfiber lens cloth used very gently will do the trick. Blow or brush off any dust that may be on the lens first.
Otherwise the lens may have what gets called "cleaning marks" which comes from over zealous cleaning. The fine scratches, aka cleaning marks are not removable, but usually don't cause significant problems either. They can make the lens more prone to flare which can be avoided by using a lens hood.
If you use a lens brush, make sure it's clean and don't ever "pet" it (you will transfer oils from your skin to the lens).
If the smudging doesn't come off with careful cleaning you should return the lens if possible.