@Opus 17 Forget the IRS side of things - the logic is flawed there as well. You're right that having the box checked saying "My spouse can be claimed as a dependent" should in theory make the spouse ineligible and should not impact the eligibility of the person filing, but the IRS has stated that this is the reason that we are not getting our checks. When I told the IRS rep that it shouldn't impact my eligibility according to their requirements, I was told that that's just how it is. To your point, they can't think outside their script and figure out a solution.
The "My spouse can be claimed as a dependent" box was checked on my 2018 taxes. I am MFS, and was MFS previously (pre-2018 taxes). I had no knowledge of this being checked until I inquired about my stimulus check. My 2019 taxes (which were not filed before the stimulus checks were disbursed) do not have this box checked. I did not call customer support in 2019 when filing my 2018 taxes because I didn't know this problem existed. However, as you can see here, there is anecdotal evidence of folks who did call customer support at the time and were told not to worry about it.
