What issues did stalin, roosevelt, and churchill disagree on

They disagreed on the control of poland, economy of germany and sphere of influence in europe during the Yalta Conference.

They disagreed on which parts of Germany were to constitute each zone, they disagreed on the exact amount of reparations Germany had to pay and they disagreed on tbe types of governments to be established in Eastern Europe and the extent of Soviet influence in Europe. This was what was disagreed on during the Potsdam Conference