if the event that I purchased tickets for is has been cancelled due to the virus ....How do I get my refund back

Refunds are always from point of purchase

Not sure. Through Ticketmaster definitely

are my ticket for the Four Tops and Temptations still good for date November 6, 2021

Seems you have to wait for the rescheduled date if the tickets were purchased through the box office. Ticketmaster or Live Nation would not refund me when all events were cancelled due to COVID because I did not have a purchase order number.