In FH3 my thrustmaster tmx force feedback doesnt go back to center.

Can anyone help?

I would unplug the wheel usb cable and the unplug the power cord. Then reconnect the power cord then the usb cable. That will cause the wheel to recalibrate. Make sure you also quit the game before doing all that.

I tried but no luck

Try this. Unplug the usb cable and power cord. Turn the wheel all the way to the left until it stops. Plug the power cord in then the usb cable. See if the wheel calibrates properly and goes back to center.