hello i got the same problem when i file for year 2017 tax. i put zero for both for me and for my spouse and t worked. Turbo tax not able to guide me as they tried to guide me step by step and even after putting the correct agi seeing old records it is no use. after submitting more than 4 times i took the advise of the person mentioned here and i put zero and it accepted.
thanks to everyone.
