Updated: April 16, 2018

For those who procrastinate, tomorrow is the last day to file your 2017 Income Tax without penalty. That deadline would normally be on April 15th, but because it falls on a Sunday, and today is a holiday in Washington D.C., this year's deadline is Tuesday.

Today and Tuesday are expected to be busy for most tax preparers. Some people wait as long as they can to file because they don’t have all the documents they need, or they’re still tallying up the things they can write off. Some know they are going to have to pay taxes and wait until the last minute to do so.

Some taxpayers may work well under pressure, but most of us do not. So don’t hesitate any longer, make an appointment with your tax preparer, file on line, or have filings postmarked by tomorrow.

If you haven't filed yet, experts say you need to file for an extension. You can do that by filling out the IRS 4868 form. A tax extension gives you an additional six months to file your taxes.

Filing a tax extension is free and in most cases, an extension is automatically granted.  A tax extension does not change the tax payment deadline, but it gives you more time to file your return.

Any tax liability is still due by the April 17 deadline, but if you can't find a way to pay - file anyway. You still need to get an extension because if you don't and don't pay your tax liability, the penalty is around 5 percent a month. If you file the extension and pay later it is only a half percent per month, so that is a big difference.