your loss. In fact, not only are you precluded from repurchasing the same stock, you are precluded from purchasing stock that is "substantially identical" to it – a vague phrase that is a constant source of confusion to investors and tax professionals alike. Finally, the IRS mandates that you mustFor many investors, and even some tax professionals, sorting through the complex IRS rules on investment taxes can be a nightmare. Pitfalls abound, and the penalties for even simple mistakes can be severe. As April 15 rolls around, keep the following five common tax mistakes in mind – and help keep a little more money in your own pocket.

1. Failing To Offset Gains

Normally, when you sell an investment for a profit, you owe a tax on the gain. One way to lower that tax burden is to also sell some of your losing investments. You can then use those losses to offset your gains.

Say you own two stocks. You have a gain of $1,000 on the first stock, and a loss of $1,000 on the second. If you sell your winning stock, you will owe tax on the $1,000 gain. But if you sell both stocks, your $1,000 gain will be offset by your $1,000 loss. That's good news from a tax standpoint, since it means you don't have to pay any taxes on either position.

Sounds like a good plan, right? Well, it is, but be aware it can get a bit complicated. Under what is commonly called the "wash sale rule," if you repurchase the losing stock within 30 days of selling it, you can't deduct your loss. In fact, not only are you precluded from repurchasing the same stock, you are precluded from purchasing stock that is "substantially identical" to it – a vague phrase that is a constant source of confusion to investors and tax professionals alike. Finally, the IRS mandates that you must

p a little more money in your own pocket.

1. Failing To Offset Gains

Normally, when you sell an investment for a profit, you owe a tax on the gain. One way to lower that tax burden is to also sell some of your losing investments. You can then use those losses to offset your gains.

Say you own two stocks. You have a gain of $1,000 on the first stock, and a loss of $1,000 on the second. If you sell your winning stock, you will owe tax on the $1,000 gain. But if you sell both stocks, your $1,000 gain will be offset by your $1,000 loss. That's good news from a tax standpoint, since it means you don't have to pay any taxes on either position.

Sounds like a good plan, right? Well, it is, but be aware it can get a bit complicated. Under what is commonly called the "wash sale rule," if you repurchase the losing stock within 30 days of selling it, you can't deduct your loss. In fact, not only are you precluded from repurchasing the same stock, you are precluded from purchasing stock that is "substantially identical" to it – a vague phrase that is a constant source of confusion to investors and tax professionals alike. Finally, the IRS mandates that you must

p>Say you own two stocks. You have a gain of $1,000 on the first stock, and a loss of $1,000 on the second. If you sell your winning stock, you will owe tax on the $1,000 gain. But if you sell both stocks, your $1,000 gain will be offset by your $1,000 loss. That's good news from a tax standpoint, since it means you don't have to pay any taxes on either position.

Sounds like a good plan, right? Well, it is, but be aware it can get a bit complicated. Under what is commonly called the "wash sale rule," if you repurchase the losing stock within 30 days of selling it, you can't deduct your loss. In fact, not only are you precluded from repurchasing the same stock, you are precluded from purchasing stock that is "substantially identical" to it – a vague phrase that is a constant source of confusion to investors and tax professionals alike. Finally, the IRS mandates that you must

t, since it means you don't have to pay any taxes on either position.

Sounds like a good plan, right? Well, it is, but be aware it can get a bit complicated. Under what is commonly called the "wash sale rule," if you repurchase the losing stock within 30 days of selling it, you can't deduct your loss. In fact, not only are you precluded from repurchasing the same stock, you are precluded from purchasing stock that is "substantially identical" to it – a vague phrase that is a constant source of confusion to investors and tax professionals alike. Finally, the IRS mandates that you must

your loss. In fact, not only are you precluded from repurchasing the same stock, you are precluded from purchasing stock that is "substantially identical" to it – a vague phrase that is a constant source of confusion to investors and tax professionals alike. Finally, the IRS mandates that you must match long-term and short-term gains and losses against each other first.

2. Miscalculating The Basis Of Mutual Funds

Calculating gains or losses from the sale of an individual stock is fairly straightforward. Your basis is simply the price you paid for the shares (including commissions), and the gain or loss is the difference between your basis and the net proceeds from the sale. However, it gets much more complicated when dealing with mutual funds.

When calculating your basis after selling a mutual fund, it's easy to forget to factor in the dividends and capital gains distributions you reinvested in the fund. The IRS considers these distributions as taxable earnings in the year they are made. As a result, you have already paid taxes on them. By failing to add these distributions to your basis, you will end up reporting a larger gain than you received from the sale, and ultimately paying more in taxes than necessary.

There is no easy solution to this problem, other than keeping good records and being diligent in organizing your dividend and distribution information. The extra paperwork may be a headache, but it could mean extra cash in your wallet at