Help with salary cap 4 raps dynasty

I did some research and found out that most teams in the nba are above cap,way over. Michael Curry is on the raps although he signed with another team. As the GM, I have to release him since I like playing with the real life roster plus Jerome Moiso is a free agent and so I should sign him.Can someone please help by telling me how this affects the team salaries and aloso the total team budget?I know wat salary cap is but if every team is above,then trades shouldn't be possible,right?Help please!

Trades should still be possible aslong as the players being traded between teams have contract totals of similar amounts.