After creating the assessment, you can visit the settings page to edit the assessment. Here are all the steps to do it:
Manage Assessment
Starting with Manage Assessment:
Edit the assessment title
Edit the course class - Which class will access the assessment
Edit the course - Which course is this assessment linked to
Edit the section - Is there a specific section that will take this assessment?
Edit the chapter - Is there a specific chapter for which this assessment will be conducted?
Click on Update