If you are not ready to file, just send in Form 4868 on or before the magic date.

There are other more esoteric reasons that apply to taxpayers in specific situations. This is absolutely no excuse for not filing or failing to get an extension. If you are not ready to file, just send in Form 4868 on or before the magic date. To ensure that you payments are made timely, you should consider making them by electronic funds withdrawal. You have rights and protections throughout the collection process.