How do I open a TurboTax return from 2007?

2007?   TurboTax and the IRS save returns for seven years.  If you used online TT to prepare the return, it is gone.   If you used the CD/download, you should have saved it as a pdf so that you could open it using Adobe Acrobat, etc.  If you only have the tax file, but not a pdf, then you could try using tax printer.com. This is a service NOT affiliated in any way with TurboTax, and we do not know what it would cost.

2007?  Do you have the tax file ending in .tax?   If you have a .tax or .tax20xx file you need that year's Desktop program installed to open it.

Turbo Tax doesn't have programs older than 3 years.  You might be able to find one on Ebay or Amazon or somewhere but you wouldn't be able to update it or download the state program.

You could try the TaxPrinter service (not connected with Turbo Tax) to convert a .tax file to pdf at

http://www.taxprinter.com

They might be expensive and it is probably not safe to email tax returns back and forth.

OR get a copy from the IRS -

http://www.irs.gov/Individuals/Get-Transcript