Capital gains taxes are taxes that you need to pay when you sell an asset that has gone up in value. You are taxed on the difference between what you bought the asset for (called "basis") and what you sold it for. Every piece of property has a tax basis.
Generally, an asset is inherited with a basis equal to its date of death value. This is called a stepped-up basis, because an asset's basis is increased to reflect its value at the date of death. A step-up in basis is a big tax advantage, because it reduces the capital gains taxes due upon sale of an inherited asset. The higher the tax basis, the lower capital gains upon the sale of that property.
Click on the state-specific article below to learn about capital gains taxes in your state.