Simply swipe to the left over the Shazam you wish to delete - the option to delete will then become available.
Delete all tags.
Uninstalling and reinstalling your app from your phone will delete your tag history from that device. You can always see your previous tag history by visiting 'My Shazam' at http://www.shazam.com/myshazam.
Go to your Favorites tab, touch and hold on the tag you'd like to delete. The tags on the favorites list will wiggle and a black X will appear in the upper right-hand corner. Touch the X to delete the tag.
From Auto Tagging Carousel
On the left hand corner of your Tagging Carousel you'll see a grey X with a number of tags to be deleted. You can only delete the entire carousel of tags, not one at a time. Tap on the X and then confirm by tapping "Clear All."
There is currently no way to delete your tags online via 'My Shazam.' We are working on having this feature fixed and added in a future update. We apologise for any inconvenience caused in the mean time.
There is currently no way to delete your tags on a Windows 8 Desktop app. We are working on having this feature fixed and added in a future update. We apologise for any inconvenience caused in the mean time.