Tax, Business & Financial Resources

Make federal tax payments online through the IRS payment portal.

Pay your individual tax bill or estimated tax payment directly from your bank account at no cost.

Enroll and make federal tax deposits and business tax payments electronically.

View your tax account balance, payment history, and manage your tax records securely online.

Apply for an installment agreement or payment plan if you cannot pay your tax debt in full.

Find the correct IRS mailing address to submit your paper tax return or correspondence.

Download official tax forms, instructions, and publications from the IRS.

Stay updated with official IRS news releases, tax tips, and announcements.

News, guidance, and updates specifically for tax professionals and enrolled agents.

File returns, make payments, and manage your Illinois tax accounts online.

Official website of the Illinois Department of Revenue for all state tax information.

Make individual income tax payments to the state of Illinois.

Make business tax payments including sales tax, withholding, and estimated tax.

Download official Illinois state tax forms and instructions.

Contact the Illinois Department of Revenue for questions about your state taxes.

Find the correct Illinois DOR mailing addresses for forms, payments, and correspondence.

Learn about the latest tax law changes, new deductions, and updated filing thresholds.

View annual inflation adjustments for tax brackets, standard deduction, and contribution limits.

Comprehensive guide to available tax credits and deductions for individual taxpayers.

Find the correct IRS mailing address based on the form you are filing and your state.

Find the correct address to mail your individual tax extension request.

Find the correct IRS address to mail your quarterly estimated tax voucher and payment.

Reach the IRS by phone, find office hours, and schedule in-person appointments.

Get help resolving tax problems you can't resolve through normal IRS channels.

Contact the SSA for Social Security number, benefits, and wage reporting questions.

Apply online for a free Employer Identification Number from the IRS.

Learn about different business entity types and their tax implications.

Access federal programs, loans, grants, and resources for starting and growing a business.

File annual reports, look up business entities, and manage Illinois business registrations.

IRS guidelines on how long to keep tax records and what records to maintain.