Originally I forgot to include my 1095A form. A week later I noticed my blunder and quickly filled out a 1080x form with a check with the amount that TurboTax said to write a check for. I mailed that out and the check has been cashed. Before receiving my 1080x the IRS mailed me a letter saying to not use a 1080x but instead a 8962. They've already cashed the check so I'm not sure what my next step is. The 8962 form I filled out says that I owe them the amount that the first check was for, I think. Is a response from me even needed? Do I send a letter saying exactly this?