After you file

 

TurboTax (TT) does not automatically prepare a School District return, you must initiate it. 

 At the screen, in the Ohio program, titled  "A few things before we wrap up your state taxes"
      scroll down to School District taxes. 

 

The Ohio School District (SD) is usually e-filed with the state return, but there are exceptions. Read the 'filing instructions" that TurboTax prepares, They will tell you if the SD100 was e-filed or if you have to mail it.