The place to start, process at the temperature in the kit, for the time indicated in the kit.
Ok. I'm a little confused. Everyone talks about a "kit." I never bought a kit when I started developing my own B&W. I bought a developer, a fixer, and Permawash separately. Never as part of a kit. Is this where the peculiarities of color come in place? Where you can't mix chemistry as you can in B&W and you need to buy a proper "kit," apparently put together by someone who knows what he's doing, so you can properly develop a color negative?