I mailed my 2014 and 2015 adjustment in first week in January. IRS received it 05 Feb 2018, my adjustment was just completed today 18 MAY 2018 with a note stating "Your account was adjusted on May 18, 2018. Within three weeks, you will receive a notice that explains the adjustment". Mine has definitely taken over 16 weeks. It is understandable because it's tax season and the IRS site also states it could take longer during the tax season.
I'm not sure if I'm getting a refund but will you all know what happens. Hope it helps someone!
