Tips for returning a car after a lease?

I’m turning in my car in two days and I don’t know what to expect.

My dealer has informed me that they will inspect it upon return. I should also mention that I’m leasing another car from the same dealer.

It’s in very good condition (practically new) with the exception of a few scratches and a little nick in the leather seat. Will I be charged for this? Also, should I get it detailed before I return it?