Hi @reddy421 ,
You can create 400 linked reports , then set each report parameter to a default value , then open each linked report to each store. Howerver, there are 400 stores, the work will be huge. I would like recommend another method to you,it is the data driven subscription , please refer to this link:create-a-data-driven-subscription-ssrs-tutorial
If you have questions during creating subscription,please feel free to contact me.
Best Regards,
Isabella
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