I tried with turbo tax to pull back the excess money forwarded to 2018 back into my 2017 amended dues, but it seems to be a manual and error prone process, done separately for state and federal, and not supported by the software. I don't know if I can or should do it, or if it's not supposed to be done and I should pay my amended dues separately.
Also I don't know what to do with the California refund paperwork I need to declare in 2018 because that's wrong now too.
