how to print a .tax file?

You can save the .tax file, but you can't print it.  See How do I save my TurboTax Online return as a tax data file for details.

You can print a PDF of your return using these instructions.

Turbotax only supports 2022 through 2025. 2022 support will end in October. If you are trying to print a supported year, open the return and go to File>print. You must have a compatible printer. If it's an unsupported year, if it was filed, you can get either a transcript (free) or a copy ($30) from the IRS for any year 2019-2025. maybe even 2018

Transcript 

copy

Copy of your tax return

To get a complete copy of a previously filed tax return, along with all attachments (including Form W-2), submit Form 4506, Request for Copy of Tax Return. Refer to the form for instructions and for the processing fee.

If you're a taxpayer impacted by a federally declared disaster, the IRS waives the usual fees and expedites requests for copies of tax returns for people who need them to apply for disaster-related benefits or to file amended returns claiming disaster-related losses; see Publication 3067, IRS Disaster Assistance – Federally Declared Disaster Area PDF. For additional information about tax relief in disaster situations, refer to Topic no. 107 or call the IRS Disaster Assistance Hotline at 866-562-5227.

To request a copy of a fraudulent tax return, when someone else used your name and Social Security number as a primary or secondary filer to file the return without your permission, use Form 4506-F, Identity Theft Victim's Request for Copy of Fraudulent Tax Return PDF. For more information, see the instructions in Form 4506-F and Instructions for requesting copy of fraudulent returns.

@nelsons21  For what year?  You need that year’s Turbo Tax program installed to open a .tax20yy file.  If you used the Online version you need yo download the pdf file.

Or If you have old .tax files you can try converting them to pdf files at  Www.Taxprinter.Com