After you file

You can purchase the Desktop version (each year that you need to file) of TTax for previous years at the link below and install it on your own computer.

Previous years' TTax

http://turbotax.intuit.com/personal-taxes/past-years-products.jsp

Beware of purchasing TTax software on eBay and other secondary sources.  Not only may the software be of questionable authenticity, it may not be able to be updated so that it is usable

When mailing a printed return it is always a good idea to go to the Post Office and mail it 'Certified' with 'Return Receipt'.  That way you will have proof that they received it and when it was received.