How to enable Adobe Analytics as a report source?

Hi ​@PrasanthV  

Please make sure you have both an Analytics user account and a Target user account and your Analytics and Target accounts are linked in the Experience Cloud 

Your user accounts must be configured as described  below 
https://experienceleague.adobe.com/en/docs/target/using/integrate/a4t/account-reqs#concept_4bc06cab00bf46ff9362afe98656b083 

And once you reviewed above then follow this doc https://experienceleague.adobe.com/en/docs/target/using/integrate/a4t/a4timplementation 

Thanks,