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Many states are getting very specific with taxes on illegal drug sales, so that dealers, once caught, get slapped extra hard for their ill-gotten gains.

In January, Tennessee joined a handful of other states that charge sales tax on illegal drug sales. Among the new tax rates: a $50 per gram tax on cocaine and a $3.50 per gram tax on marijuana (other than stems).

"Luckily for conscientious dealers, the law does not require them to give the names and addresses of their clients," jokes John Abolins, senior vice president of operations at Taxware.com, a provider of tax calculation software.

"It's one more way that governments say crime doesn't pay."

7. Don't soil your tax return. One final tip: When you send in your taxes, don't attempt to be a practical joker.

"We've seen it all," says Denise Azimi of the California Franchise Tax Board.

Over the years, a few people have scrawled nasty notes on their tax returns, along with obscene pictures. A few have even smeared documents with "unspeakably foul" substances, Azimi says.

"If it's bad, we ask the police to pay the sender a visit."

The penalty for soiling a tax return isn't an aggressive audit. "It's just upsetting for people in the mailroom, and they aren't the people you want to vent frustration on," Azimi says. "They don't set policy."

If your actions slow down tax collectors, you'll still be entitled to your tax refund, but the check may have to be passed through the bars of your prison cell.

Buck Wolf is entertainment producer at ABCNEWS.com. "The Wolf Files" is published Tuesdays.