Thank you Ryan.  I clicked on the Lists menu and there was no Templates.   So thank you for your reply but your suggestion did not work.  However,  I've persevered and been able to update our address at last.  Here is what I did (in case any one else has the same problem)

I clicked on the quickbooks logo in the top left corner, then opened preferences ,  then my company and was able to change our address..   I'm happy !!!!!!!