Hi @Priya you can create an automation rule for this.
Example Automation Rule:
Trigger: Issue Created
Condition: Issue Type = Subtask
Branch: Parent Issue (Epic)
Action: Edit Issue (Copy values from Epic to subtask using smart values like {{issue.epic.field}})
Summary of Smart Values:
Copy Summary: {{issue.epic.summary}}
Copy a custom field: {{issue.epic.customfield_10000}} (replace with the actual field ID)
Copy Labels: {{issue.epic.labels}}
Copy Priority: {{issue.epic.priority.name}}
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