Below is a complete list for the locations of all minikits in Chapter 12: Anger Management.
Part A MInikits
Minikit #01: Seek out a window at the top-right side for Hawkeye to break, then send someone who can fly up there so you can use your telekinesis ability on the fruit bowl.
Minikit #02: There's a forklift in the lower level that can be fixed with either Tony Stark or Ultron. Take the vehicle to a box on the left side and lift it to find this piece.
Minikit #03: There's a golden wall at the bottom of the elevator for someone who can use lasers to carve through.
Minikit #04: Smash the remains of the hanging crate to the left and create a speed pad from it. This should allow someone like Quicksilver to get on a walkway with this minikit waiting at the end,
Part B MInikits
Minikit #05: Break all the stuff at the right side of the area to uncover a vent for Vision to use. Use your telekinetic powers on the piano at the other side.
Minikit #06: Quick one here. All you need to do is hypnotize the drummer.
Minikit #07: There's a box in the southeast corner of the room for Ultron to smash. Construct a camera from the bricks to get this collectible.
Minikit #08: Search the west side of the room for a table and break it. You should see damaged panel below. Break that too.
Part C MInikits
Minikit #09: Another quick one. Smash the silver traffic light.
Minikit #10: To get this collectible, you need to warn two groups of three people using the "Warn Citizen" ability from Veronica's satellite. The first group of civilians are in the first area and the remaining group is in the second area.