Please check this answer. Dayton is an 'associate member' of CCA and TT can do CCA taxes. As of TurboTax Deluxe 2020, it appears that Dayton, OH taxes can be computed and the forms completed, however at the end of the process, TurboTax warns users that Federal and State returns must be e-filed, but the local return must be printed and mailed.
See also: https://ttlc.intuit.com/community/returns-and-forms/help/which-city-tax-returns-can-i-do-in-the-turb...
