The best source for tax information is your accountant or tax attorney. They can help you interpret the laws and regulations and apply them to your business situation. But if you want to do some of the research yourself to improve your knowledge and to help keep costs down, check out the Internal Revenue’s website. 
Yes, the IRS has a great website with all the forms and publications available for downloading. No more running to the library to get the forms you need! There’s a search able database, a great site tree and tax calendars to show you what’s due when. They’ve even included information on recent tax law changes, frequently asked questions, and much more… Yes, they have an excellent, easy-to-use website… Now if they could just do something about those tax forms…
Federal Tax Forms for Businesses with Employees
(Applicable for all forms of organizations, some forms may not apply)
- Form I-9: Employment Eligibility Verification
- IRS Form SS-4: Application for Employer ID Number
- IRS Form W-2: Wage and Tax Statement
- IRS Form W-3: Transmittal of Wage and Tax Statement
- IRS Form W-4: Employee’s Withholding Allowance
- IRS Form 940 or 940-EZ: Employer’s Annual Federal Unemployment Tax Return
- IRS Form 941: Employer’s Quarterly Federal Tax Return
- IRS Form 8109: Federal Tax Depoist Coupon