Terrance-are you not able to customers that you have just added?   It happened to me. There is a section when adding a customer that has display name and print on check (or something like that- don’t have QBO in front of me).  Check the drop down and select the display name by Last, First.  That fixed it for me.  Then go back and edit the others you couldn’t find.  You’ll probably have to search by the first name in the customers section.  Hopefully this makes sense.