Andy,
I gather from your profile that you fly R22s; well, tail rotor failure is covered in the emergencies section of the R22 handbook. Briefly you enter autorotation, and before flaring, roll the throttle into the detent. Then you flare and raise the lever as usual - throttle in detent, so no engine, so no torque reaction. With TR failure in the hover you close the throttle into the detent, then raise the lever. If it happens below 500 ft, eg in the transition, you keep flying until you're above 500 ft; if above 60 kts, you should be able to maintain controlled forward flight.
At least, that's the theory, I'm not speaking from experience.