There are various Nikon DX 18-55 available. See here: https://helpx.adobe.com/x-productkb/multi/lens-profile-support-lightroom-4.html
Some of the profiles are available fro RAW photos only. Are you shooting RAW (NEF) or JPG?
What is the exact type of the lens and the camera?
Nikon D5200 DX18-55mm 1:3.5-5.6G DX 55-300 1:4.5-5.6GED. I shoot raw&jpg fine. because because Lr5.6 wont handle Nikon raw. I know need CC6. If I can get the right profile it will save a step or two.
Nikon D5200 is supported since LR 4.3: https://helpx.adobe.com/creative-suite/kb/camera-raw-plug-supported-cameras.html
You don't need LR6 for this combination of camera and lenses.
So, if you work with RAW, the profiles should show up automatically, or should be selectable manually at last.
I am not currently on my LR computer, so I can not check if the profile is for jpg also.
Do you let LR handle jpg as separate photos or not?
yes I work with jpg and raw. if I don't upload as DNG my raw files have problems when I move them to Ps