Edit: For anyone that comes to this topic and is having issues submitting the tax form. Can you contact us and we'll get you talking to the correct person. If it's an issue on our end we'll help you get through, otherwise, we'll get you in touch with the company that builds the tax form so they can help you.
I can forward this bug to the company that manages the form. In the meantime, I've noticed that sometimes if you tab out and back into the field and retype the value it might cause the error message to clear. Tell me if you're able to get it working.
