Amended return rejected, Form 1040-X Line 7 (0.) does not match Form 1040 Line 21 (blank). Code: F1040X-007-01

I have received a rejection for my amended return. Rejection code: F1040X-007-01

 

After reading what others have done to fix this error, largely on this (https://www.reddit.com/r/tax/comments/me0ud0/rejected_amended_return_1040x/) forum, it appears that one of the family-related credits questions in the EasyStep view that generates an entry on the 1040 form I can see in the Forms view is not able to produce a 0. In particular, once I go to file I find that Form 1040-X Line 7 (0.) does not match Form 1040 Line 21 (blank). This appears to match the explanation for the error I got in the original email from TurboTax informing me of the rejection.

 

This appears to only be true on the *PAID* desktop version I have (Deluxe for Mac), but is easily resolved using the free online version. 

 

Thanks in advance for your help.