The 26-year-old has a Tongan dad and Samoan mother and previously represented Mate Ma'a Tonga, with his last test being the Rugby League World Cup qualifying win over the Cook Islands in 2015.
He was ruled out of World Cup consideration last year after suffering an anterior cruciate ligament tear midway through the NRL season.
Taufua said he reached out to Toa Samoa coaching staff a few weeks ago to make it clear he was keen to play for them in the Pacific Test.
