According to CNN Money, most Americans are clueless when it comes to taxes. 75% of people polled didn’t even know this year’s filing deadline date (it’s April 17).

As we reported earlier, many people are not claiming the telephone tax refund and of those who are, many are incorrectly filing for inflated refunds.

From misconceptions about the AMT (Alternative Minimum Tax) to being uninformed about standard deductions and exemptions, a lot of Americans are less prepared to do their own taxes than they think they are. The result could be receiving a lower refund than they are due or the unexpected arrival of a bill from the IRS.

If you have a complicated return, you may want to use a paid tax preparer who is familiar with the ever-changing tax code.