The Submittal Action list is on the Project Settings page. Scroll down to the Construction Administration settings.
Click on the Submittal Action List box
Click once on the Submittal Action List box to display the list of preconfigured options, then select from the drop-down list.
Start typing to find the option you're looking for.
In general, the options you need will be available in the preconfigured list.
Only if the option you need is not in the preconfigured list, use the add link to add it.