Being granted TPS does not mean you get permanent residency. When the Secretary of Homeland Security determines the termination of your country’s TPS designation for your country, your immigration status will return to what it was before your TPS status. If that previous status was expired, you would need to return to your home country unless you obtain a different status. If your TPS status is extended, you need to re-register with USCIS for the period of time the TPS is extended. You can do so by filing Form I-821 (during the extension period).