The version of TurboTax you need to use is determined by the
information/answers you have entered into your return. It may be that one of the
forms you need to file is required in the Self Employed version of TurboTax.
This link
will show you the forms that each
program will file (scroll down and click on the Tax Forms tab):
https://turbotax.intuit.com/personal-taxes/online/free-edition.jsp
If you feel
that you do not need the higher version of TurboTax,
you can clear your return and start
over to downgrade (as long as you haven't paid for or
registered your account), instructions here:
https://ttlc.intuit.com/replies/4248526