Labor insists the Abbott government still has questions to answer about links between the Liberal party and a junk food lobbyist.
During the 2013 election campaign the Liberals announced a $16 million grant to chocolate-maker Cadbury to reopen a visitor centre in Tasmania.
Labor frontbencher Anthony Albanese said that as regional development minister he had overseen the government's $100 million Tasmanian jobs plan, which involved input from the state government, business and community groups.
He said it was well-known the government was seeking a broad range of submissions for job-creation projects but not one had come from Cadbury.
"There wasn't any lobbying or any submission received, no approach to me as minister at all from Cadbury," Mr Albanese told reporters on Thursday.
Food industry lobbyist Alastair Furnival attended the Liberal party's Cadbury project announcement, sitting in the same row as Prime Minister Tony Abbott and senior Tasmanian senator Eric Abetz.
After the election Mr Furnival was hired by Assistant Health Minister Fiona Nash as her chief of staff.
But he quit two weeks ago after it was revealed he was still listed as a lobby company director and shareholder when the minister's office ordered a newly launched healthy food rating website be taken down.
The junk food industry did not like the website.
Senator Abetz told an estimates hearing on Monday he knew Mr Furnival's background as a lobbyist before he took on the role in Senator Nash's office.
When asked had Mr Furnival come to him as a representative of Cadbury, Senator Abetz said: "He and I had had discussions in the past."
Mr Abbott told parliament on Wednesday, when asked about the conflict of interest and Mr Furnival's resignation, that "within a couple of days of issues being raised, the staff member in question did the right thing and he resigned".
Opposition Leader Bill Shorten said it was hard to believe the government did not have earlier knowledge of the conflict of interest.
"There are more questions for this government to answer about the role of the lobbyist and the government decision-making on Cadbury," he said.
