Navigate to the issue you would like to be the parent issue of the sub-task you are about to create.
Select More > Create Sub-Task. You will see the Create Subtask screen.
Fill in the details as needed, and then click Create at the bottom of the page.
32. How to create Kanban board in JIRA?
Let’s see step by step process of creating Kanban board in JIRA
Log In to the JIRA application using valid credentials and get navigated to the dashboard.
Click on Project dropdown and select Create Project.
Select Kanban Software development and click Next.
Enter all the necessary details and click Create.