LABOR will tell voters to put the Greens last on the ballot paper in all Tasmanian federal electorates except Denison, where preferences will be crucial to deciding the result.
In Denison, Labor and the Greens have done a deal to direct preferences to each other ahead of the incumbent independent Andrew Wilkie.
As postal voting opens today, the parties confirmed the order of their how-to-vote cards.
Mr Wilkie will benefit from preferences from the Liberal Party, prompting claims from Labor candidate Jane Austin that he was cosying up to Opposition Leader Tony Abbott.
"That is by default a vote for Tony Abbott as prime minister of this country," Ms Austin said.
At the last election Mr Wilkie scored just 21.26 per cent of the primary vote but was elected on preferences.
Mr Wilkie, who has again chosen to hand out an "open ticket" rather than tell voters who should get their second or third preferences, said he had not had any discussions with Mr Abbott about preferences and had not spoken to either party leader since Parliament last sat at the end of June.
Mr Wilkie said the Liberal Party's decision that he was "the best of a bad bunch" did not mean he was aligned to the opposition, pointing out Liberal preferences helped him over the line in 2010 and he then helped Labor form government.
On Greens' how-to-vote cards the Palmer United Party will be placed ahead of Labor and Liberal in the seats of Franklin, Braddon and Bass.
In Lyons the party will run an open how-to-vote card.
Labor state secretary John Dowling said preferences would have little impact except in Denison, with Ms Austin the only candidate considered a threat to Mr Wilkie's hold on the seat.
Labor will preference the Liberal Party ahead of Mr Wilkie.