Every business owner needs to manage both personal and business income tax obligations for the state in which you live--unless you are one of the lucky few that live in a state without a personal income tax.
Nearly all states begin with your federal tax adjusted gross income in order to determine your state income tax liability. Each state will generally have a unique set of adjustments to the federal AGI--some adding back income to offset federal deductions that the state does not allow and others subtracting various deductions that the state does provide. Once the state taxable income is determined, then the state's tax rates are applied to determine the amount of tax that you owe.
Click on a state on the map below to learn about its personal income tax rate.