 After a year with FC Lahti, Tanska was transferred to the Swedish club Assyriska FF in 2015,
but ended up playing only six games there before his contract was terminated for financial reasons.He then returned to Lahti and played there until the end of the 2016 Veikkausliiga season, after which he moved to Ilves.Tanska rejoined FC Lahti for the 2019 season.