If you are using the ID.me Authenticator app as a code generator, and you are having issues entering the code, first make sure that you are entering the code before time expires. A new code is automatically generated every 30 seconds. (In the example below, you have 19 seconds to enter the code displayed before a new one is generated.)
You may also need to update time and date settings on your device. For more details and troubleshooting tips, click here.