At this point, you may actually find it easier to do a SD100 return by hand, than in TT. For the form, see https://www.tax.ohio.gov/portals/0/forms/ohio_individual/individual/2022/SDIT_SD100_Bundle.pdf
The mailing address is on the form.
Instructions begin at page 47 at http://www.tax.ohio.gov/portals/0/forms/ohio_individual/individual/2022/PIT_IT1040_Booklet.pdf
You can no longer e-file a a 2022 SD 100 if you have already filed your state return. But, it is possible to "I-file" at the Ohio Dept. of taxation web site. https://tax.ohio.gov/individual/file-now/online-services-file-now
