Oh my, there is another problem. Right after I posted the above, I noticed you are using the Basic Edition for Mac. At least that is what is indicated right under your question.
The Basic Edition does not include a state program. How did you end up with Basic Edition? What edition did you use in Online TurboTax? Since you had stocks, you had to have have used Premier Edition or higher.
When you asked for the Mac amend software, they should have furnished you Deluxe or higher in order to have an included state program.
If you really have Basic Edition, you'll need to phone TurboTax Support and ask them to resolve the state issue and either furnish you the state software to install into Basic, or to furnish you a higher product that includes a state program (Deluxe or higher). Since you have stocks, I'd ask for Premier.
Or did you purchase Basic Edition to do this amended return not knowing that TurboTax will provide the 2017 software free to amend a 2017 online return?
