Is it the Federal 2016 return that you actually want? Why did you mention Florida? Florida has no state income tax return per se. Just a Form DR-405 for FL businesses and rental properties with tangible personal property to be filed with the county property appraiser by April 1 of each year.
If you are now in Online Deluxe for your 2018 return, that is already more than enough to unlock a prior-year return, so do not upgrade any further. The minimum payment is Free Edition upgraded to PLUS at 19.99, but 2018 Deluxe is 59.99 for Federal (and 44.99 for state).
Did you use Online Deluxe to prepare your 2018 return? If so, have you already paid and filed it? Or is the 2018 return still in preparation? Do you need Deluxe because of the situations in your 2018 return? Or did you upgrade a 2018 Free Edition too far and ended up in Deluxe? Are the 2016 and 2018 returns in the SAME account?
If you don't need Deluxe for your 2018 return, we can tell you what to do when you answer all the questions I asked above.
