Ok thanks, i will try this tonight.
Her is what i got from the X-Plane.org forum :
I do not have the TBM 900. So I cannot test it now. But from my knowledge Saso (Totoritko, the main developer) has implemented the braking system as it is in the real plane. Which means you need to apply the toe brakes to enable the parking brake then. With a small knob below the pilot yoke. As it is typical in a Socata. Since the parking brake is only an extra valve which "hold" the pressure you applied through the toe brakes. But if this is true and there is no option in the plane to "simulate" an easy approach then you need to use pedals or a script, which simulates the toe brakes. I am using the latter approach since I have also no pedals. For this I have a FlyWithLua script (https://forums.x-plane.org/index.php?/files/file/37662-differential-and-progressive-brakes-for-x-plane-11/). With this script I can assign a key or button to a function, which applies a progressive pressure to both toe brakes. I cannot life without this script now