You may still want to fill married filing separately for states if you recognized a gain on your FL house sale (since you will not have a state filing in FL for this sale but may have to include it on a jointly filed MI state return.
Another con would be that if your income (in FL) is higher than your husband's income (in MI), the marginal tax rate on your FL income might be too high to offset any benefit for filing jointly in MI.
For your FL home sale, for federal income tax purposes:
You can
take the gain exclusion as long as you considered the home your "primary residence" for 2 of the last 5 years. If
you have a capital gain from the sale of your main home, you may qualify to exclude up to $250,000 of that gain
from your income. You may qualify to exclude up to $500,000 of that gain
if you file a joint return with your spouse
If you
did not use the home as your primary residence for 2 of the last 5 years and
meet the home gain exclusion requirements, you may still be eligible for
partial exclusion if you can show the main reason you sold your home was
because of a change in workplace location, for health reasons, or because of an
unforeseeable event
See
this IRS link for more information on the exclusion:
https://www.irs.gov/taxtopics/tc701.html
Here is some information about filing jointly for
federal and separately for states. (To expand the answer, select see entire
answer)
https://ttlc.intuit.com/replies/3301995
