You have to enter your Form 1095-A in TurboTax. Then TurboTax will fill out Form 8962 for you and you can print it out.
Is the letter from the IRS a LTR 12C asking for Form 8962, and possibly other forms? If so, follow the instructions in the FAQ at the following link. At the bottom of the FAQ click the link for the type of TurboTax software that you are using.
I got a 12C letter from the IRS (Form 8962)
Also read the information at the following link on the IRS web site.
Understanding Your Letter 12C
