As taxpayers are (or should be) aware, federal income tax returns must be timely filed to avoid potential penalties under Internal Revenue Code (Code) Section 6651. Historically, this meant mailing a tax return and, for returns filed close to the due date, ensuring that the “timely mailed, timely filed rule” applies (see here for our recent post on the “mailbox rule”). In recent years, there has been a push to electronically file tax returns with the Internal Revenue Service (IRS). However, for one reason or another, the potential exists that an e-filed return may be rejected. (more…)