You know the saying that there’s no free lunch?

Well, the Internal Revenue Service is trying to prove you can get something free when filing your taxes.

This year, all taxpayers can file returns for free electronically without having to purchase tax software or go through a tax preparer.

Since 2003, people with low to moderate incomes could file their tax returns electronically at no charge by going through the federal agency’s Free File program. The program is run through a partnership between the IRS and the Free File Alliance LLC, a group of private-sector tax preparation companies.

Free File, which is available in English and Spanish, enables taxpayers with adjusted gross incomes up to $56,000 — 70 percent of taxpayers — to use commercial tax software to file their federal tax returns. Participants are asked a series of questions to smooth the process and to determine the deductions and credits for which they are eligible.

Last week, the IRS announced that for the 2009 tax-filing season, regardless of income, anyone can file for free electronically by going to irs.gov. Even if you earn too much to qualify for Free File, you can still use that program’s e-file forms to complete your taxes.

“The bottom line is there is virtually no reason every taxpayer shouldn’t be filing electronically this year,” said David Williams, the agency’s director of electronic tax administration and refundable credits.

I’ve always thought Free File was a good program but it was irritating that it wasn’t available to those brave souls who file on their own. In 2008, 62.8 million people relied on tax preparers to electronically file their returns, while 26.9 million taxpayers e-filed their returns using purchased software.

Some tax preparers offer to file their clients’ returns electronically without a fee. Similarly, a number of large software companies are now waiving the $10 to $12 additional fee to file electronically, Williams said.

I want to make it clear that only participants in Free File get to use the free software that gives you step-by-step help by asking questions about your tax situation.

If you are filing though the IRS Web site and are not eligible for Free File, or you’re not using commercial tax software or a tax preparer, you will not get the question prompts or tax advice when you e-file. The free, self-serve e-file option available only through Free File does not include an “interview” process, Williams said. But it does allow you to electronically enter your tax information, perform basic math calculations, sign and submit your return electronically, and print it out for your records. Basically you are replacing the paper return you would file with an electronic version.

One of the benefits of e-filing is that your refund gets to you faster. Taxpayers who choose the direct-deposit option can get refunds in as little as eight to 10 days, as opposed to the four to six weeks if your return is sent by regular mail.