I fully agree ... RUN to a local tax pro to get this error fixed correctly ... you cannot fix it yourself. AND for the 2019 return go back and say you did not have the credit ... sadly this will keep you from efiling ... you will have to MAIL in the 2019 return. And expect issues with it's processing until you get the 2016 return corrected ... adding an explanation to the 2019 return about the missing 5405 & the fact the 2016 has been mailed would be wise ... again RUN do not walk do not pass GO.
