Publication 501, Exemptions, Standard Deduction, and Filing Information
This publication discusses some tax rules that affect every person who may have to file a federal income tax return.
Publication 519, U.S. Tax Guide for Aliens
For tax purposes, an alien is an individual who is not a U.S. citizen. Aliens are classified as nonresident aliens and resident aliens. This publication will help to determine an individual’s status and gives information needed to file returns.
Publication 525, Taxable and Nontaxable Income
This publication discusses many kinds of income and explains whether they are taxable or nontaxable.
Publication 529, Miscellaneous Deductions
This publication explains which expenses you can claim as miscellaneous itemized deductions on Schedule A (Form 1040 or Form 1040NR).
Publication 597, Information on the United States – Canada Income Tax Treaty
This publication provides information on the income tax treaty between the United States and Canada. It discusses a number of treaty provisions that often apply to U.S. citizens or residents who may be liable for Canadian tax.
Publication 901, U.S. Tax Treaties
This publication will tell you whether a tax treaty between the United States and a particular country offers a reduced rate of, or possibly a complete exemption from, U.S. income tax for residents of that particular country.