The minor party struck a deal with the government on Tuesday to pass the bill this fortnight in exchange for extending an inquiry into separate changes to the National Disability Insurance Scheme.
The Greens also secured a handful of amendments to the tax changes.
The coalition has strongly opposed the tax changes, saying they will hurt young home buyers and small businesses, leaving the Greens as the only path for Labor to get the bill through the Senate.
Under the agreement, the government will close a loophole where people can buy property through self-managed super funds to avoid the CGT increase.In exchange for the Greens' support of the tax changes, the government has agreed to extend the NDIS inquiry by eight weeks.Labor has also made a number of amendments to the NDIS bill, curbing ministerial powers and improving transparency.But the Greens say even with those changes, they will still oppose the bill.
A snap parliamentary inquiry's final report on changes to the $56 million NDIS scheme was due to be tabled on Tuesday after two extensions were granted.
However, an interim version is expected to be tabled instead, with the committee now set to deliver a final report by August 14.
The proposed NDIS overhaul would boot 160,000 people from the scheme to rein in spending and leave thousands more with less funding.
Delaying the report will grant more time to build pressure on both Labor and the Liberals to withdraw support for the bill entirely, the Greens said.
