had a client who did not disclose he had insurance thru the exchange(1095-A). tax refund is being held.he finally managed to receive his 1095-A, provider said he didn't need it anyway. IRS sent him letter 12c requesting 1095-A. of course he can't find the letter. any one have an idea where to mail the 1095-A. this is why I pdf a copy to IRS when filing the return.  have googled and searched IRS.gov