Welcome to JustAnswer and thank you for giving me the opportunity to assist you.
Unfortunately, the TurboTax software for 2007 and earlier years is no longer available directly on TurboTax. You can obtain the TurboTax 2007 version on Amazon, but I wouldn't recommend doing that.
Since you will have to mail in your tax return anyway, your best course of action at this point would be to have any major retail tax preparation company prepare your 2007 tax return. In the alternative, you could download the forms directly from the IRS website, prepare a paper return and mail it in to the IRS.
Please let me know if you require further information or assistance.
Thank you and best regards,
The Premier version should suit your needs because you have to report the sale of an investment property.
It's been my pleasure.