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We've been married  for over 10 years. I have no income. I really am unsure why she files married filing separately.  I assumed maybe she felt she earned it and she wanted the credit for everything she's earned incase at some point if I do have income it will show who's earned what. 

As far as child credits both of us have children from previous marriages but they are all grown so tax credit are not an issue.

However, she us encouraging me to get SSDI  and I am truly not sure I want to go there because it would make me feel as I'm unable to do anything worthwhile.

We live in Indiana and I'm not familiar with the tax laws/credits/etc.

You said there's not a portal for a non filers to get the stimulus then why did a friend of mine who in 2018 -2020 was incarcerated and after bring release went to the gov site and filled out all their information and received 3 stimulus checks.  $1200, $600 and then $1400?

My wife nor I owe back taxes or child support.  What do I do next?