Tatkal quota is 10 per cent of the seats in AC class (not 1AC), and 30 per cent of Sleeper class available on the particular train. Please note that some trains are 24 coaches, 19 coaches and so on. Hence it is not possible to give a specific reply unless you specify the train. Even that is difficult at this time as season has started, and railways add coaches as per demand and route conditions. Good wishes.