However, most states follow the deadline to file a federal tax return extension. They mostly relate to tax extension filing deadlines, tax payment rules, or certain tax extension forms to fill out (or not, in some states' cases). However, in general, filing Form 4868 gives you an extra six months to file your taxes. So, if you are not able to file your tax return by the due date (which for most Americans is April 15), by waiting too long to efile you can lose your refund. FileLater is an authorized IRS e-file provider and files both IRS 4868 and IRS 7004 forms electronically. FileLater is an authorized IRS e-file provider and files both IRS 4868 and IRS 7004 forms electronically. Prices determined at the time of efile and are subject to change without notice.