Don W. Amstrong CPA, Inc. - Your CPA firm in Norman who understands small business.


New Employee Forms


Use this form to determine employees' federal income tax withholding.


All employees must complete this form at time of hire for the Immigration and Naturalization Service.

Financial Links


One of the top sources for personal finance needs from MSN. Provides quotes, stock research, portfolio tracking and news. Pay bills online. Stay up to day and informed with a variety of personal finance topics.

Dow Jones Market Watch

Latest financial news and commentary, stock quotes, mutual funds, tools and research and much more.


Form 1040 Tax Estimator

By entering your filing status, income, deductions and credits into the 1040 Tax Estimator you will receive an estimate of your total taxes for the latest tax year. Also provides an estimate of any tax refund or amount owed to the IRS.

Self-Employment Tax Calculator

If you work for yourself, run a farm, or are employed by a church, this calculator will estimate the self-employment tax you owe. The Self-Employment Tax Calculator uses the most current tax tables, subject to any changes in the tax code.

Payroll Deductions

Have your deductions changed due to marriage, a new baby, or adoption? Then you may want to use this calculator to assist in determining the impact of changing your payroll deductions will have on your take-home pay. The Payroll Deductions Calculator uses the most up-to-date withholding schedules.

Government Links

The Internal Revenue Service

The official IRS site includes Downloadable tax forms and publications and tax advice.

Social Security Administration

The official web site of the U.S. Social Security Administration provides assistance with retirement, medicare, disability, survivorship and other benefit questions.

U.S. Small Business Administration

The SBA site provides information in easy to understand English for entrepreneurs and small business owners.

U.S. Department of Commerce

Everything you need to know about the Commerce Department and its organizations, including Bureau of Industry and Security, Economics and Statistics Administration, Census Bureau, and the Minority Business Development Agency.

Federal Citizen Information Center

Includes a catalog of free and low-cost federal publications of consumer interest, plus a blog, RSS feeds and e-mail alerts.

Call us to schedule a consultation: 405.321.7621