Illinois -Turbotax entering late penalty on estimated payments.
Problem seems to be that I received an unforeseen substantial lump sum of income in December. The first 3 estimated payments were equal like the state likes. So my 4th payment was a lot higher than the first 3. And Turbotax takes my total tax divided by four and assesses a penalty on the first 3 payments. I can't find a way to accommodate this. Does anyone have an idea how to handle this?