Is all income earned in a tax free state taxable if I move to a state that taxes income ?

[rjs]

Any income that you earn while you are living in a state that has income tax will be taxed by that state, no matter where the income is from. But income that you earned while you lived and worked in a state with no income tax, before you moved, does not become taxable by the state that you move to after you earned the income.

If you worked in a state that has income tax while you were living in a state with no income tax, the income is taxable by the state that you worked in, even though you lived in a state with no income tax.

[Hal_Al · Accepted solution]

You report all your income, received while a resident,  on your resident state return, including the income earned in another state. Your home state calculates tax on all your income, but gives you a credit, or partial credit, for tax you paid to the other state.

When you worked in a state without an income tax, there will be no credit, since there was no  tax. In other words, having worked in a state without an income tax does not get you out of paying state tax on that income, to your home state