The 28-year-old joined Gloucester on loan at the end of engage Super League XI with the two clubs agreeing a fee for a permanent move.
However, Tadulala was unable to obtain a work permit to switch codes and after spending the off-season in Australia has returned to Belle Vue.
"We're absolutely delighted," said head coach John Kear. "It's worked out for the benefit of the club in the long run.
"He's refreshed but he's come back in great shape. You forget what a big, fine athlete he is."
Tadualala has twelve months left on his Wakefield contract, and was the side’s leading try-scorer last season with 17 touch downs in 27 games for the club.