"Amend using Turbotax online" does not work

I had submitted 2023-tax return using Turbotax online last year. I got a letter from IRS later so need to file an amended return now. But when I click "Amend using Turbotax Online" option, there is no response in my Turbotax account.  What should I do to use the "Amend using Turbotax online"?