How to add/modify tags of EBS Volume
Follow these steps to add or modify EBS volume tags:
From the Main Menu, select EC2.
Click the black arrow on the left to expand the EC2 Instance's EBS volumes.
From the EBS menu, select Manage Tags.
To modify the value of the existing tag, enter new value in the text box and click Save.
To add a new tag, enter tag name and click Add New Tag; the new tag appears on the list of tags, where you can then modify its value.