Get your taxes done using TurboTax

Some advantages of the Desktop CD/Download program over the Online version,  <a rel="nofollow" target="_blank" href="https://ttlc.intuit.com/questions/2750704-what-are-the-advantages-of-the-turbotax-cd-download-softwa...>

 All the Desktop versions have the same forms so you can use a lower version.  You just get more help in the higher versions.

And the Desktop program can do unlimited returns and efile 5 Federal for free.
You can see and enter directly into the actual forms.
There is a What-If worksheet.

The Online web version is different than the Desktop CD/Download program you install.  The pricing structure is totally different.  

Online you pay to prepare the return whether you efile or print and mail.  Efiling is free and included in all versions.  And state is a Separate Additional charge in ALL Online versions including the federal Free Edition.   Oh and Online is only good for 1 Account and 1 return.  In the Online versions you have to use a higher versions to enter certain types of income like investments and self employment.  Online you can’t see the actual forms like the Desktop program.  

BUT  I see you are posting from an older Mac.  You will have to use the Online version. Or update your Mac or find another computer.  Mac System Requirements     
<a rel="nofollow" target="_blank" href="https://ttlc.intuit.com/questions/1899173-minimum-system-requirements-for-turbotax-mac-software">htt...>