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@nejidoreb123 wrote:

.....what is the additional tax assessed $371, do I need to wait for a notice?

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You can wait for a notice or call customer service.

https://www.irs.gov/faqs/irs-procedures/refund-inquiries/refund-inquiries-20

Definitely, you'd have to wait or call in for an explanation. 

BUT

If you overpaid SS from two jobs, that indicates a fairly high income....perhaps your income was high enough that you were also subject to the additional 0.9% Medicare tax assessed on high wage earners.  (i.e. the extra $371)

Read:

Topic No. 560 Additional Medicare Tax | Internal Revenue Service (irs.gov)

How did you calculate the extra $371? My social security wages between the two jobs is ~192k, SS withheld is ~12k total, so I overpaid by $3079.

It seems like they already gave a credit of $3079 in the first return for the excess social security withholding. Then they refunded another $3079 minus 11 (which I paid for changes in amended return) minus 371 (for new tax due).

Here is the CP21B notice. I'm not really sure why $3079 is processed twice? Am I eligible to cash the refund?

Don't know if this means anything or goes together but did anyone notice that 371 is 360+11?  

Yes that is weird. The $360 is penalty for my excess Roth contribution. The $11 is when I amended my return I added 1099-INT and had to pay extra.

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@VolvoGirl wrote:

Don't know if this means anything or goes together but did anyone notice that 371 is 360+11?  

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Yes, and 371 + 2719 = 3090. Then if you subtract the $11 (-11) that equals $3079.