Electronic Filing (e-file)
The transmission of tax information directly to the IRS using telephones or computers. Electronic filing options include (1) Online self-prepared using a personal computer and tax preparation software, or (2) using a tax professional. Electronic filing may take place at the taxpayer's home, a volunteer site, the library, a financial institution, the workplace, malls and stores, or a tax professional's place of business.
Source: Internal Revenue Service