Tax preparation varies between states due to differences in tax laws, rates, credits, deductions, filing requirements, and more.
State taxes in the US are distinct from federal taxes, with specific tax deductions and credits available at the state level.
Some US states have no state income tax, while others impose flat or progressive tax rates, leading to variations in the tax preparation process.
Tax filing requirements, such as multi-state income and nonresident tax returns, contribute to differences in tax preparation procedures among states.