@dmertz - Thank you. In New Jersey, the employer is required to report it (disability income and tax) (not the employee who received it). Weird, but true. I believe my employer waited to send the corrected (amended) information to the IRS even though they sent me a corrected W2, and that is probably why it flagged the IRS.
I am sure my employer waited until April 15th as a 'just in case' buffer, in case they had to make other corrected w2s for others- at least that is my educated guess.
