I have a few tags that I would like to merge but am unsure of how to proceed.

For example I would like
expression engine
&
ExpressionEngine

to be merged into ExpressionEngine

Hey Sean,

What you need to do is go to the Manage Tags tab in the Tag CP

CP Home › Modules › Tag › Manage Tags

Then, in this case, click the Tag you’d like to be changed (to an existing Tag).
In your case, you want expression engine to be ExpressionEngine…

So, click the Edit link beside expression engine.
Then, rename it to ExpressionEngine
Then, click “YES” for “Combine Tags”

Thank you - that worked great.