Scott Morrison remains on track to win 78 seats in the lower house, with the coalition leading in Tasmania's Bass electorate and Macquarie in NSW.
The Australian Electoral Commission has also added the Queensland seat of Lilley to its list of close seats, bringing the total to three.
Prime Minister Scott Morrison appears to have the 76 seats he needs to govern in a majority but could be in line to score an extra two.
Late on Tuesday, Chisholm - in Melbourne's east - gave the Coalition the majority it needs after Liberal candidate Gladys Liu made history as the first Chinese-Australian woman to enter the Lower House.
Labor leads in Lilley, with AEC figures on Wednesday evening showing candidate Anika Wells leading her Liberal National Party rival Brad Carswell with 50.5 per cent of the two-party preferred vote.
The Liberal candidate for Bass, Bridget Archer, sits on 50.4 per cent of the two-party vote in her electorate - 504 votes ahead of incumbent Labor MP Ross Hart.
In Macquarie, the Liberals' Sarah Richards leads Labor MP Susan Templeman, by 196 votes with 88 per cent counted.
If the current count trends continue, the Liberal-National coalition will have 78 seats, with Labor on 67 and six crossbenchers.
In the previous parliament, the coalition had 74 seats, Labor had 69, there were four independents and the Greens, Centre Alliance and Katter's Australian Party had one each.
Along with counting postal votes for all 151 seats in the House of Representatives, the AEC on Tuesday began its Central Senate Scrutiny process.
Under a process, a computer is used to register the 100-million plus preferences marked on Senate ballot papers, which are later verified by a human operator.
The coalition's Senate numbers could rise from 31 to 34 out of 76 seats.
The government will need to rely on either Labor, nine Greens senators or five out of six conservative crossbenchers to get its legislation through parliament.
The election writ must be returned by 28 June.
