Ken and Daria Dolan are widely known as America's First Family of Personal Finance.

Here's a little tax trivia for you...

How many pages long is the United States Tax Code? If you guessed 18,500, you win the prize. It's no wonder that so many of us make mistakes when filing our federal income tax forms.

A mistake or two on your tax return can bring you unnecessary stress, delay your refund and subject you to more pesky paperwork -- or worse yet, an appointment with an IRS agent to fix the problem.

But here's the good news... The most common taxpayer mistakes are, for the most part, very simple to avoid once you know to watch out for them. So let's look at the Dolans' Dirty Dozen. Here are 12 common taxpayer mistakes you can easily avoid:

Personal finance experts Ken and Daria Dolan answer your questions every Friday.

Dear Ken and Daria,

Having two mortgages is about to kill my financial status (I needed to move closer to my family). What do you see in your crystal ball that assures me that this situation will come to an end SOON? Thanks for your input.

--Martie

Click here to ask Ken and Daria your question.

Ken and Daria Dolan, widely known as America's First Family of Personal Finance, offer advice on all things money at Dolans.com.