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@Kristielynn wrote:

Those are the transcripts from that year. And I didn’t work in 2017   I didn’t start work for 1 or 2 yrs after he passed away. I am remarried now does that make a difference with anything. I was only married to him 1 month in 2016.  I don’t think I should have been reliable for any of this.   


There's nothing in the transcript I can see that explains why the additional tax was assessed, but they did send a letter in Sept 2019.  Did you get it?

 

There's a difference between an account transcript and a return transcript.   If you requested one, try requesting the other and see if it is different.  I don't know which transcript would specifically have the details of why the tax was assessed or if that is only in the notice they sent.  

 

If you are remarried, your current spouse can file an injured spouse form to try and protect part of your refund.  But if you legitimately owe the tax, delaying payment is just going to increase the tax and penalties.