Information For...

For you and your family
Standard mileage and other information

Forms and Instructions

Individual Tax Return
Instructions for Form 1040
Request for Taxpayer Identification Number (TIN) and Certification
Request for Transcript of Tax Return


Employee's Withholding Allowance Certificate
Employer's Quarterly Federal Tax Return
Employers engaged in a trade or business who pay compensation
Installment Agreement Request

Popular For Tax Pros

Amend/Fix Return
Apply for Power of Attorney
Apply for an ITIN
Rules Governing Practice before IRS


334號刊物 - 導言資料
Publication 334 - Introductory Material

1. 申報和繳納營業稅
Filing and Paying Business Taxes

2. 會計週期和處理方法
Accounting Periods and Methods

3. 企業財產處置
Dispositions of Business Property

4. 營業優惠
General Business Credit

5. 營業收入
Business Income

6. 如何計算已售物品成本
How To Figure Cost of Goods Sold

7. 計算毛利
Figuring Gross Profit

8. 營業費用
Business Expenses

9. 計算淨利潤或虧損
Figuring Net Profit or Loss

10. 自雇(SE)税
Self-Employment (SE) Tax

11. 納稅人的權利
Your Rights as a Taxpayer

12. 如何獲取更多資訊
How to Get More Information