Non zero starting amount for my amended return

I have started with amending my 2020 tax return. My starting number was reset to $0 for Fed and $0 for NY but it is showing $100 for NJ. I have not made any changes to the return and just started with the amend return. Is n't everything reset to $0 before we start amending the changes? If Yes, why I am getting a non zero starting number?