Hi @Balakrishna_ABK
Greetings!!
May I know why you need approval on change task? Add hoc approval can be added via Approval activity in Workflow on change level but not task level.
https://www.servicenow.com/community/developer-forum/how-to-update-approval-policy-with-dynamic-ad-h...
https://www.servicenow.com/community/developer-forum/adhoc-approvers/m-p/1766158
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Regards
Dr. Atul G. - Learn N Grow Together
ServiceNow Techno - Functional Trainer
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