I wish to see where are my tasks located when I do a create task in SourceTree in Pull request comments
If you are using Bitbucket then you will see your tasks there only -
You can keep track of all open and resolved tasks with a consolidated list available from the top of a pull request.
Refrence - https://blog.bitbucket.org/2014/09/16/introducing-pull-request-tasks/
PS: If you are on some other tool, there should be similar options.