I have received the same error and I am using Turbotax online and I am itemizing my deductions. When I put zero in the field I keep getting a loop back to the same error. The solutions haven't worked and I am on the threshold of $150000 limit for the third stimulus for 2020 returns. If they go by 2019 I will not receive any amount of stimulus check and will be out $2400 I am ready for the return to be filed and this is the only thing holding me up. I need this to be processed now or it will be to late. How do we get pass this? This error is only seen after the purchase of turbo tax and it then reviews.
