Does panic strike when the Sage customer support representative asks this simple question?  

It shouldn't   We've got you covered.  Just tell us what you think it is ... or even if you have no idea whatsoever, we'll be happy to guide you to where you can find out.

But even better, if you are like me and never want to be caught unawares, attached here is a simple one page Release Version Cross-Reference for Sage 500 ERP.

Simply bookmark this blog and never get spooked  again by something as simple as not knowing how to identify the Release of Sage 500 you are currently using. 

Oh, and by the way, if you are using a Release prior to 2017 ... you are missing out on some pretty neat stuff ... so, consider an upgrade in this year's planning