Hard to tell (although several States don't even have one - like the Dakotas, Florida, Nebraska, Nevada)...you can't just look at rates. The income they tax, which is always different than federal taxable income which is (almost) always different than what your gross pay is...that the State considers taxable (some allow dividends or interest or other things special exempt ot lower tax handling, others do the opposite). And of course, whatever a state doesn't collect money by means of an income tax it gets by having the other taxes, sales taxes, property taxes, etc) proportionally larger.
Federal and State
The Highest percentage income tax in the year of 1918 was 77%
What was the highest percentage income tax being paid in 1918
Texas does not have a state income tax.
There is a state income tax in Illinois.
No, when filing for the state income taxes, you will receive your federal income tax refund as well as your state income tax refund.
Nevada did not and does not have a personal income tax
State income tax payments are deductible on your federal income tax return. (You may deduct state income tax or sales tax, but not both.) Federal income tax payments are deductible on your state tax return in a tiny number of states.
Yes..only on that portion of income properly allocated or attributable to that State.
Florida does not have an individual state income tax. They do have a corporate income tax.
The taxable amounts of the income from each income tax return will be taxed at the tax rates for the state and for the federal.
No, South Dakota does not have a state income tax.