Tax Year Prior to 2020: Report ISO Exercise and Hold for AMT

Hello, I have a question on how to report ISO exercise and hold for AMT. am using the web version of turbotax premier for 2018 tax. I am currently stuck at the follow step:

Screenshot from 2019-02-12 14-03-33.pngScreenshot from 2019-02-12 14-04-45.png

I don't know what to fill here...

I was expecting it to be more intuitive, like how it was reported in the regular tax section, see below:

Screenshot from 2019-02-12 14-05-57.pngScreenshot from 2019-02-12 14-06-29.png

Screenshot from 2019-02-12 14-12-33.png

 

Please help! Thank you very much in advance!