I was in a similar situation, but I was unable to file early, because unlike W2 forms that must be delivered to the employee by Jan. 31, I was waiting for a W6 form and a 1099.
With that being said, it is my understanding that those people who filed early, using the incorrect information and as a result received a greater subsidy than they were entitled to do not have to file an amended return or return the money. I would check with the insurance exchanged you use to buy your insurance. I got hit with a $2,000 repayment charge because of error made during the enrollment debacle. I am not sure who was at fault because my file is corrupted and I cannot open it, but the government employees can, but cannot tell me what is in it. That is another issue. From what I know, you do not have to amend your return or refund your money if you filed before being advised that the 1095 form was incorrect.