The TurboTax tax data file which has a file extension of .taxyyyy, where yyyy is the tax year of the file such as .tax2020 for tax year 2020, can only be opened by the TurboTax software for the year of the file. The TurboTax software can only be installed on a personal computer, desktop or laptop, Windows or Mac, not on a mobile device.
The PDF of the tax return can be opened by any PDF compatible application, such as Adobe Reader.
How to save the tax return as a PDF using the TurboTax mobile app - https://ttlc.intuit.com/community/saving/help/how-do-i-save-my-return-as-a-pdf-in-the-mobile-app/01/...
How to print your tax return using the TurboTax mobile app - https://ttlc.intuit.com/community/printing/help/how-do-i-print-my-return-in-the-mobile-app/01/27034
