will I receive a confirmation of completing an extension request?

If you use TurboTax or other software to file an extension online, you'll get confirmation that your extension was accepted.

• The IRS does not confirm extension requests sent by U.S. mail or an authorized private delivery service. But they will notify you if they deny your extension.
• If you file a separate extension for your state income taxes, contact your state’s tax agency. Ask them how to confirm your extension's status.
• Even if you get a filing extension, you must pay any taxes you owe by the original deadline. This is needed to avoid penalties and interest.

See this tax tips article for more information.