What is Tax Extension?
Definition A tax extension gives you more time to file your return, generally about six months, by submitting Form 4868 for individuals or Form 7004 for businesses by the original deadline. Importantly, it extends the time to file but not the time to pay, so any tax owed is still due by the original date to avoid interest and penalties. An accurate payment with the extension keeps a client penalty-free.
Clients often assume an extension delays payment, so setting the right expectation and estimating the balance due prevents surprise interest and penalties.