(The legislation currently before parliament doesn't cover trusts — that will come later.)The government will amend its tax legislation in the Senate to provide more certainty on the details — the current version leaves much up to the treasurer's discretion.In what will be an intense fortnight of sitting beginning Monday, ahead of the winter parliamentary break, the government's wish is to get through both its tax legislation — encompassing reforms to negative gearing and capital gains tax, and including the Working Australians Tax Offset — and its NDIS reform legislation.It is looking to the Greens as partners to pass the tax reforms (even though the Greens have criticisms of the negative gearing grandfathering) and to the Coalition to be the dance partner on the NDIS legislation.There had been speculation about a possible opposition-Greens deal to extend both the Senate inquiry into tax (which the Coalition would like to do) and the inquiry into the NDIS (that the Greens want to run longer) But the more it does so, and the longer it takes to put in place state government supports to fill gaps, the less the prospect of meeting the financial targets, especially that highly ambitious one of an annual cost increase of only 2 per cent.Reform of the NDIS is at the heart of the budget's savings, and slippage would have serious fiscal consequences.Despite its hopes of securing the NDIS legislation in the coming sitting, the expectation is that the government faces the prospect of having to accept a longer inquiry.The reform task in migration is less acknowledged by the government, but also imperative