Form 3115, Application for Change in Accounting Method
File this form to request a change in either an overall method of accounting or the accounting treatment of any item.
Form 8959, Additional Medicare Tax
Use this form to figure the amount of Additional Medicare Tax you owe and the amount of Additional Medicare Tax withheld by your employer, if any.
Publication 15 (Circular E), Employer's Tax Guide
This publication explains your tax responsibilities as an employer.
Publication 334, Tax Guide for Small Business (For Individuals Who Use Schedule C or C-EZ)
This publication contains general information about the federal tax laws that apply to small business owners who are sole proprietors and to statutory employees.
Publication 510, Excise Taxes (Including Fuel Tax Credits and Refunds)
This publication covers the excise taxes for which you may be liable and which are reported on Form 720 and other forms. It also covers fuel tax credits and refunds.
Publication 538, Accounting Periods and Methods
This publication explains some of the rules for accounting periods and accounting methods. It is not intended as a guide to general business and tax accounting rules.
Publication 551, Basis of Assets
This publication discusses basis, the amount of your investment in property for tax purposes. It discusses cost basis, adjusted basis, and basis other than cost.
Schedule A (Form 1040), Itemized Deductions
Use this schedule to figure your itemized deductions. In most cases, your federal income tax will be less if you take the larger of your itemized deductions or your standard deduction.
Schedule SE (Form 1040), Self-Employment Tax
Use this schedule to figure the tax due on net earnings from self-employment.