I am running 12/3 wire into 3 kitchen outlets. In my panel box I had an electican deciate two 20amp breakers for the red hot wire and black hot wire. I have connected the black wire to 2 different outlets and are working great. I need another outlet using the red hot wire. So, my question is I know that the red is hot so do I just connect it to the other reds and continue my circuit to the third outlet? Then do I also connect to the 2nd outlet white and neutral wires on the last outlet to finish the circuit?
You have a multi wire branch circuit. You are correct that the reds go to 1 set of outlets with the white and ground from the point you brought the black, white & ground. The first outlet in each string should be a GFCI for all counter top outlets 2014 NEC 210.8.A.6. The handles should be tied with a listed snap on tie or a double pole breaker to be fully code compliant.