She supported the Luzon invasion until late January 1945 when she returned to Ulithi. On 1 February, "Tallulah" was transferred from the 7th to the 5th Fleet for the Iwo Jima invasion. She put to sea on the 16th and conducted fueling-at-sea operations until 3 March, when she returned to Ulithi for upkeep. Ten days later, she exited the lagoon again and resumed fueling the fleet, still operating off Iwo Jima and preparing to soften Okinawa.