I got a letter today from the IRS saying they received my 2015 1040 but not the 8962 form for Obamacare (ACA) tax credits. I did send the 8962 in, back in April 2016, along with my 1040. For some reason they also now want a copy of my 1095A form although it was not required with the original filing.
I got a similar letter last year and when I called up they said ignore it.
Just asking here before I call, since last year I had to wait on hold forever.
Thanks!!