The government wants legislation cutting the corporate tax rate from 30 per cent to 25 per cent to be passed this week, the final parliamentary sitting before the May budget.
Independent senators Derryn Hinch and Tim Storer are still refusing to sign on.
But Finance Minister Mathias Cormann says the cuts are important.
حمّل تطبيق أس بي أس الجديد للاستماع لبرامجكم المفضلة باللغة العربية.