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In Illinois, businesses and individuals are required to follow specific tax compliance requirements and adhere to the state’s tax rates.























These guidelines provide an overview, but individual circumstances may vary. Consulting with a tax professional or the Illinois Department of Revenue is recommended for personalized advice.

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Individual Income Tax Rates
Corporate Income Tax Rate
Sales Tax Rate
(State+Local)
Filing Deadlines
Estimated Tax Payments
Penalties for Non-compliance
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Alabama
2% - 5%
6.5%
4% + Local (varies)
April 15
Quarterly payments required
Late filing: 10% of tax due;
Late payment: 1% per month;
Interest: 5% per annum
Alaska
No state income tax
No state corporate tax
0%
(Local sales tax may apply)
April 15
No state requirement for estimated payments
Late payment: Interest and penalty of 5% of unpaid tax;
Collection costs may apply
Arizona
2.59% - 4.50%
4.9%
5.6% + Local(varies)
April 15
Quarterly payments required
Late filing: 4% per month, up to 25%;
Late payment: 1% per month, up to 16%
Arkansas
2.59% - 4.50%
4.9%
5.6% + Local(varies)
April 15
Quarterly payments required
Late filing: 4% per month, up to 25%;
Late payment: 1% per month, up to 16%

