We have received a few calls regarding the new 1095-C form that you will be receiving from AT&T. You should have received a letter from AT&T stating that it would be sent to you in late January. However, on December 28, 2015 the IRS extended the due dates for large employers to send these forms. Large employers have until March 31, 2016 to get these forms to you. Below, we quote from the IRS website (follow the link for additional information):
Some taxpayers may not receive a Form 1095-B or Form 1095-C by the time they are ready to file their 2015 tax return. While the information on these forms may assist in preparing a return, they are not required. Individual taxpayers will generally not be affected by this extension and should file their returns as they normally would.
Consult your tax professional for more information regarding this.