Weather the income tax influence on saving behavior is positive or negative depends on the net effect of income effect and substitute effect resulted by the tax saving.

所得税对储蓄行为的影响是积极的还是消极的，取决于税收储蓄的收入效应与替代效应的相对大小。

youdao

On the other hand, if people have a specific amount they wish to leave to their children, the estate tax might have the opposite effect, increasing saving.

ECONOMIST: Death and taxes

One would allow an unlimited exemption for saving, in effect turning the current income tax into a consumption tax.

ECONOMIST: America's fiscal deficit