According to the IRS, what is the most common mistake made by tax filers?

McGruff

Incorrect Social Security or Tax ID numbers. WASHINGTON - The number most likely to be wrong on a tax return isn't an income or deduction amount, according to the Internal Revenue Service -- it's the identification number for the taxpayer, spouse, or dependent. This was the most frequent error last year and the second most common mistake in returns received by the IRS through February 1998. http://www.unclefed.com/Tax-News/1998/nr98-25.html Since the last thing you want is the IRS to pay special attention to you, make sure you pay special attention to your tax form. About 1 million, 160,000 tax payers, made the same mistake on their 2001 returns -- incorrect social security numbers. http://abclocal.go.com/wls/story?section=News&id=1321289 Jun 04 06, 7:46 AM

MyAlias

Lack of signature is also very common. Jun 04 06, 6:40 PM