More Reasons to eFileMail gets lost or stolen: Your tax return can get lost in the mail while an eFiled return won't get lost. File electronically, and you get immediate confirmation that your tax return has reached the IRS.
Know when your refund will be deposited: If you have a tax refund coming, eFile and your tax software will tell you when your refund is being processed and when to expect your refund to be deposited.
No transposed numbers: Prepare your tax return on paper and you could make an error when you transfer calculations to your tax forms. Income tax software is required to offer the option to eFile, and the software does all the tax calculations and then double-checks the numbers.
eFiled returns do not pass through human hands: When you mail in a tax return, someone at the IRS has to enter or scan your data into their systems. Keying errors and technical problems can interfere with getting your taxes filed properly. When you eFile, your data goes directly into the IRS systems, bypassing the chance for human error.
The IRS Prefers eFile: Starting with tax year 2010, the IRS stopped mailing Form 1040, Schedule A and other tax-related forms to tax payers. The reason for this is to save around $10 million per year and, according to the IRS, paper forms are becoming obsolete. Read IRS Stops Mailing Tax Forms, Prefers eFile for more information.