Last-minute IRS income tax filers lined up as the band played on

Band plays for last-minute tax filers
Band plays for last-minute tax filers

To the tune of "Shaft" played by the Columbia University marching band, dozens of income-tax filers raced up the steps of New York City's main post office Thursday near midnight. The deadline that so many Americans dread had arrived.

Inside, hundreds fidgeted in line and scribbled on forms and checks wherever they could find a flat surface. It was a moment played out in post offices across the country. About 20% of taxpayers submit their returns within the last two weeks, the IRS estimates. Anthony Diaz was proud to occupy the extremely late end of that bunch.

Your resource on tax filing
Tax season is here! Check out the Tax Center on AOL Finance for all the tips and tools you need to maximize your return.
What is a Schedule K-1 Tax Form?
The Schedule K-1 is slightly different depending on whether it comes from a trust, partnership or S corporation. Find out how to use this tax form to accurately report your information on your tax return.
Read MoreBrought to you byTurboTax.com
Business Use of Vehicles
If you use vehicles in your small business, how and when you deduct for the business use of those vehicles can have significant tax implications. It pays to learn the nuances of mileage deductions, buying versus leasing and depreciation of vehicles. Special rules for business vehicles can deliver healthy tax savings.
Read MoreBrought to you byTurboTax.com
How to Change Your Tax Filing Status
Choosing your filing status is an important first step for preparing your federal tax return. Your filing status determines your standard deduction, tax rates and brackets.
Read MoreBrought to you byTurboTax.com
A Guide to Self-Employment Taxes for Contractors, Freelancers, and Beyond [Infographic]
If you work for yourself and don't call anyone your boss, you're likely self-employed. This carries advantages, like not having a manager and deciding your own hours. But it also comes with trade-offs, like paying the self-employment tax and paying for your own employee benefits.
Read MoreBrought to you byTurboTax.com