Yes, I agree.
However, TTAX should be better than that. Late filing is common enough that TTAx should work by pulling correct data from the broker. My broker, Fidelity verified that they have data going back to the year 2014.
Incidentally, I was advised that a workaround might be to convert the broker's .CSV file into the .TXF file which can then be imported into TTAX. I have not yet found a file converter that works on my broker's .csv file.
