The is a question of "domicile". Your domicile is your permanent residence, the place you go back to when you are finished traveling or working or visiting elsewhere.
Your domicile is the place where you have a drivers license, have registered to vote, pay utilities, have a landline (if people still do that), where you receive your mail, and where you tell people that you live.
People have only one domicile, and the domicile does not change unless you take positive steps to change it (register to vote in the new location, buy a house, get a drivers license, forward your mail, etc.)
So, based on your description, it sounds like you used to live in Florida, own a house, have a license, etc., and for a few months, you went to Indiana to work. That does not amount to a change of domicile unless you did all these other things in Indiana, and it sounds like you didn't.
If you did not intend to make Indiana your home, then you were not a resident - see this law quote.
So it looks to me, not knowing anything more than what you have described, that you are a Florida resident who worked temporarily in Indiana, making a nonresident of Indiana.
You would file a part-year return for Indiana ONLY if you moved to Indiana with the intention of staying there. Otherwise, you are a nonresident.
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