I received the same message, I received a refund, now they say I owe $3500. They changed my taxable income to be much higher than it is so that I need to pay more tax. I have a copy of my original tax form for 2020 with the correct numbers. They wanted to know how I wanted to pay for this and they would take care of it.
I'm not sure what to do now I don't trust Turbo tax to fix it. I may call the Attorney General of my state and ask them.
