Yes, if you filed federal jointly, you must file OH jointly. Yes, you should list the same person first that was listed on the federal return. Indicate her as a full year resident and you as a non resident.
Do I need to report my income on OH tax return?
Yes.
Ohio does a convoluted
tax calculation for non-residents/part year residents. It calculates tax on
total income, then it calculates a non resident/part year resident credit,
which it subtracts from the tax it calculated on the total income. The credit
is calculated as your non-Ohio income divided by Total adjusted Income
multiplied by the total tax. TurboTax (TT)
does this by allocating your
income as either Ohio
or non-Ohio. W-2 income will be allocated by the state name abbreviation shown
in box 15
of your W-2. TT will ask you, item by item, in the state section, how much of
your other income is Ohio
or non-Ohio income. Make sure that your non-Ohio wages show CA (Other state postal abbreviation) in box 15 of your W-2 screen, with the CA amount
in box 16.
This system allows Ohio
to apply their highest tax rate, based on your total income, while only taxing
your Ohio
income.
Ohio has a nonresident credit allocation form, IT NRC, that will be submitted as part of your return http://www.tax.ohio.gov/portals/0/forms/ohio_individual/individual/2017/PIT_ITNRC.pdf
