How do I file an electronic extension in turbotax

on Desktop

TurboTax Easy Extension will be available on March 18th:

https://ttlc.intuit.com/replies/3301328

Once the Easy Extension option is available on March 18th, follow these steps to request an extension:

1. Sign in to your TurboTax Online account
2. Click on "Search" next to the magnifying glass in the top right
3. In the search box that appears, type "extend" and press return
4. Click the "Jump to" link that appears and follow the instructions

If you want to file prior to that date, you can paper file by using Form 4868:

https://ttlc.intuit.com/replies/3301811

The deadline to file a tax extension is April 18th, so you can file for an extension at any time until that date.