What tax bracket are you in?
How much to withold?
What is a FICA?
Who needs to pay estimated taxes?
How bad are the penalties and interest charges?
What are the tax forms I get in the mail?
What is a alternative minimum tax?
What are my chances of getting audited?
When to start tax planning?
IRS

Jan 31		If you haven't paid your 4th quarter estimated tax , you can opt to file last year's return by Jan 31.
Feb 17		If you claimed exemption from withholding last year, you need to file a new W-4 to continue the exemption.
Apr 15		Taxes are Due
Dec 31		Last day to setup most self-employed retirement accounts.