Play your turn when the game prompts you.
The first player opens the hand with a high card to attempt to win the trick. Each player in turn must play a card in the lead suit, if they have one. The player who plays the highest card in the suit wins the trick for their team and begins the next trick by leading a card in the desired suit.
A player may choose to cut the hand if he/she does not have cards in the lead suit. If a player breaks a suit with a spade, that team wins the hand for their team, no matter what the value of the spade the player plays (as long as no other player cuts with a higher spade). You cannot lead spades until they are broken.
