You
can stop any time and come back to TurboTax after you gather more
information. If you are online, select My Account, in the blue bar
and Save and Sign out
If
you are in the desktop version, select File in the upper left and then Save,
to save your progress.
The
driver's license number is an added security measure the IRS and States
have put in place for 2016 but for most states, your return can be
filed and will process without your driver's license number.
For
more information, please see below.
https://ttlc.intuit.com/replies/4879130
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