I'm replacing the gfci outlets in my kitchen and I purchased 15 amp gfci outlets, but I just realized this is a 20 amp circuit. Is it OK to use these outlets, or do I need to have gfci outlets rated for 20 amps? Thanks.
The only time you need a 20 amp outlet (in the NEC) is when you have only one plug on the entire circuit. Do not get confused with a duplex receptacle, there are two plugs on those, hence the "duplex".