Where do I see what school tax I owe

What kind of school tax, what state?

TurboTax (TT) does not automatically prepare an Ohio 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. 
Or later at the screen  "Your 2021 Ohio Taxes are ready for us to check"
    -Click Other situations
    -Scroll down to School District taxes.

Look at line 15 of form SD100 for the amount due. TT will also prepare payment voucher form SD 40P.

If you don't have a form SD100, on your list of Ohio forms, you didn't prepare one yet.

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