If
you received a notice from the IRS they should have included the mailing address
and a fax number for this particular notice. Or you may call them at
1-866-682-7451, extension 568, if you have additional questions.
Turbo
Tax can help you complete a Form 8962
if you have received a letter from the IRS
asking for an update. Be sure to check if the letter references tax
year 2016 or 2015. The form should have been generated when you entered
your 1095-A into the Health Insurance section of Turbo Tax, but if for some
reason it was not entered, these are the step-by-step instructions to
add them.
https://ttlc.intuit.com/replies/6136902