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Collecting Sales Tax Online

If you run a business with a physical storefront, collecting sales tax is straightforward. You charge your customers the sales tax required by the jurisdiction where your business is located. For example, if you operate a retail store in Nashville, Tenn., you collect both state and local sales taxes from customers buying merchandise at your store.

But suppose you start selling your products online. Does that mean you charge customers the same sales taxes that you do to those who are coming into your store? It depends.

When to Collect Sales Tax Online

If your business has a physical presence in a state, such as a store, office or warehouse, you must collect applicable state and local sales tax from your customers. If you do not have a presence in a particular state, you are not required to collect sales taxes.

In legal terms, this physical presence is known as a "nexus." Each state defines nexus differently, but all agree that if you have a store or office of some sort, a nexus exists. If you are uncertain whether or not your business qualifies as a physical presence, contact your state's revenue agency. If you do not have a physical presence in a state, you are not required to collect sales taxes from customers in that state.

This rule is based on a 1992 Supreme Court ruling in which the justices ruled that states cannot require mail-order businesses, and by extension, online retailers to collect sales tax unless they have a physical presence in the state.

State Exemptions

Keep in mind that not every state and locality has a sales tax. Alaska, Delaware, Hawaii, Montana, New Hampshire and Oregon do not have a sales tax. In addition, most states have tax exemptions on certain items, such as food or clothing. If you are charging sales tax, you need be familiar with applicable rates.

Determining which sales tax to charge can be a challenge. Many online retailers use online shopping-cart software services to handle their sales transactions. Several of these services are programmed to calculate sales tax rates for you.

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