"People using tax preparation software is driving the increase in e-filing," said IRS Commissioner Mark W. Everson.

So far this tax filing season, 70 percent of all returns have been e-filed, compared to 68 percent for the same period last year. As of last Friday, 28 percent of e-filed returns were filed by people using their home computers, up from 25 percent of e-filed returns for the same period last year.

Also, more people are choosing to have their tax refunds directly deposited than ever before. So far this year, the IRS has directly deposited almost 40 million refunds, or 70 percent of all refunds issued this tax filing season, up from 67 percent of the total for the same period last year.

People are also visiting the IRS Web site in record numbers. The IRS has recorded almost 84 million unique visits to IRS.gov this year, up from 80 million for the same period last year, an increase of 6.5 percent.