Check to see if there is a Form 1098 listed in your forms list and if so, delete the Form 1098.
You should be able to only enter the Property Taxes paid. I also do not have a mortgage and enter my Property Taxes using the procedure I posted without any issues.
Click on Federal Taxes
Click on Deductions and Credits
Click on I'll choose what I work on (if shown)
Under Your Home
On Property Taxes, click on the start or update button
If you are still having this issue contact TurboTax support for assistance.
See this TurboTax support FAQ for contacting support - https://ttlc.intuit.com/turbotax-support/en-us/help-article/account-management/turbotax-phone-number...
Support can also be reached by messaging them on these pages https://www.facebook.com/turbotax/ and https://twitter.com/TeamTurboTax
