Is it possible to know what version of the collection tag I'm using on my site?

Tag Version

Yes, it is possible to find out the version of the tag currently used by using the "Collection tag version" property. It is a native property that is automatically populated with data. If you collect data with the Smarttag library and with the Piano SDK, the property is also able to trace both versions:

This information can also be found in the Tag Inspector extension.

Version of the library

You can find out which library you are using simply by looking at the version number displayed. When the number is equal to or greater than 6.0, you use the Piano Analytics SDK.