You don’t need to be a tax expert when you’re running a business, but you may need to know the basics so your business can run smoothly. The IRS.gov Small Business and Self-Employed Tax Center has useful tax information and services for business owners. The tax center can help whether you are starting, operating or closing a business. You can apply for an Employer Identification Number online or get the form you need. If you want employment tax information, the center has it. It also offers tools and resources:

• IRS Video Portal.  Watch helpful videos and webinars on a variety of topics from filing and paying your taxes to understanding the IRS audit process.
• Online Tools.  The Tax Calendar for Small Businesses and Self-Employed features e-filing and e-paying options, alerts for important filing dates and tax tips. You can order a wall calendar or install the IRS CalendarConnector and access important tax dates for small businesses right from your desktop.
• Small Business Events and Educational Products.  The online Virtual Small Business Tax Workshop has nine interactive lessons designed to help you understand and meet your federal tax obligations. You can also find free IRS small business workshops and other events planned in your state.

Go to the Small Business and Self-Employed Tax Center and use the A-Z index to find whatever you need. Source