The underpayment penalty is calculated if you do not have enough withheld in income taxes throughout the year as you earn your income.
It has nothing to do with what you paid in last year on your taxes for 2019.
You can try to reduce your underpayment penalty by following the tip at the bottom of the link below.
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Ahhhh I see!! Thank you so so so much for your reply. I was so confused... however, for year 2020 then.. my income from CA is majority of our family income around 50K and my husband who is employed in KS is only around 10K for the whole year. Do we have to pay tax to KS for our total income together even though 50K was coming from CA job?
No, you would fill out the sections for income earned in other States, as well as for income taxes paid to other States in order for the program to accurately calculate any liability (or refund due from/to) for each based on State information (actually from the State, and not from you).
Having said that, the IRS is beginning to accept and process returns on February 12th and most States (given that finalization of all forms has not yet happened for all States) are doing their best to follow suit with this date.
I would try back and not submit until much closer to that date to ensure your State Information is most up to date.
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