You may qualify for each of the credits but you are correct, only one should be used on your Ohio return. It may show on the summary but not be included in the calculations.
Please check the Ohio Summary and see if both credits are included in the credit line.
- While you are in the Ohio state return
- On the left menu, click on Tax Tools
- Select Tools
- Select View Tax Summary
- Check the Credit lines
If this does not completely resolve your question, please let us know if you see the credits both on the summary and we can better assist.