Main Index of Tax Topic Categories

There are 17 main categories for which there are topics. Each category is followed by a corresponding category number. To access your category, select the three digit number.

If you don't find the answer to your general tax question below, also check Frequently Asked Questions and Tax Trails. If you still don't find the answer to your questions, please call our toll-free tax assistance line at 1-800-829-1040 for individual tax questions or 1-800-829-4933 for business tax questions.

IRS Help Available	Topic 100
IRS Procedures	Topic 150
Collection	Topic 200
Alternative Filing Methods	Topic 250
General Information	Topic 300
Filing Requirements, Filing Status and Exemptions	Topic 350
Types of Income	Topic 400
Adjustments to Income	Topic 450
Itemized Deductions	Topic 500
Tax Computation	Topic 550
Tax Credits	Topic 600
IRS Notices	Topic 650
Basis of Assets, Depreciation, and Sale of Assets	Topic 700
Employer Tax Information	Topic 750
Magnetic Media Filers – 1099 Series and Related Information Returns	Topic 800
Tax Information for Aliens and U.S. Citizens Living Abroad	Topic 850
Tax Information for Puerto Rico Residents in Spanish	Topic 900