hello, if you have a Shimano 12-speed cassette you must take these 2 sets
Shimano micro spline body 12mm Tacx
direct-drive axle with adapter set 142x12 mm and 148x12 mm Tacx
have a nice day
Gian

Everything is included in the delivery package except the sprocket.

Nothing is needed, just the sprocket set

I don't have a through axel but I think in the box came an adapter. Need to check if fits with your bike. You need an allen key to install it.

Tacx Steckachse