Yes this an error. The situation you referenced is not my case. I have one W-2 for imputed income for a group life policy. The amount in line 12 box m and n is for the social security and Medicare taxes due since they are not withheld. The percentage are correct and the amount properly carries over to the 1040. I have used TurboTax for years and had this type of W-2 but never an error until this year. Something is broken and should be fixed. Perhaps a phone call with a developer would be helpful.
