If you are unable to remove STMT from line 4A on the 1040, you may need to use Forms mode. Please be aware, that using this mode could negate the 100% accuracy guarantee.
Here is how to switch to forms mode:
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-switch-to-forms-mode-in-the-turbotax-...
You can also delete the 1099-R from the Deductions and credits section and begin again.
How do I view and delete forms in TurboTax Online?
- Open or continue your return in TurboTax.
- In the left menu, select Tax Tools and then Tools.
- In the pop-up window Tool Center, choose Delete a form.
- Select Delete next to the form/schedule/worksheet in the list and follow the instructions.
Here is a TurboTax article about IRA recharacterization.
