He returned to motorsport in 2005, making his Formula Ford debut in the Victorian Championship, finishing fourth.

In 2006, Douglas won the title and began working with the squad for HSV dealer team in V8 Supercars and testing their Commodore in the second half of the season.

In 2012, Taz Douglas was called up to drive for Lucas Dumbrell Motorsport as their full-time driver.

In 2013, Taz Douglas did not retain his full-time International V8 Supercars Championship seat at Lucas Dumbrell Motorsport.

Douglas would return to the Dunlop Series where he had spent his time driving his own team prior to getting his main game call-up.