Neither state I lived in in 2016 (WA, FL) has an income tax. TT did say I didn't need to do a WA state return, but why does it insist on doing a FL tax return?

[PhoebeAnn60]

TT's exact words, after running Smart Check::

Let's Take Care of Your State Taxes

Good news! You don't have to file a state return since Washington does not require a personal state income tax.

But based on what we know from your federal return, you still need to complete a Florida return.

[tagteam · Accepted solution]

"...why does it insist on doing a FL tax return?"

The Florida return in TurboTax is for reporting tangible personal property used in connection with a Florida-located business or rental real estate. 

You might have answered a question in such a manner as to lead the program into believing you had property to report. Since that is clearly in error, you can simply choose Skip State in the State Taxes section since Florida does not otherwise have an individual income tax.