It only appears that Ohio is taxing all your income.
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 FL (Other state postal abbreviation) in box 15 of your W-2 screen, with the FL amount in box 16.
Since FL does not have an income tax, boxes 15-17 may be blank on your actual W-2. At the W-2 screen, in TT, enter FL in box 15. Put the box 1 amount in box 16 and 0 in box 17.
Be advised that you will probably have to use a work around to get TT to prepare the return to get you your refund, if OH is shown in boxes 15-17. At the w-2 screen split the boxes 15-20 W-2 info into 2 lines. On the 1st line leave OH in box 15 but make box 16 blank; leave the OH withholding in box 17. On the 2nd line put your home state abbreviation in box 15 and the state wages amount in box 16; leave box 17 blank.
Ohio has a nonresident credit allocation form.. IT NRC
https://tax.ohio.gov/static/forms/ohio_individual/generic/PIT_ITNRC.pdf
If there is an amount box 19 (City tax), you cannot get that refunded by filing a state return. Reply back for further instructions.
