Here is what I found:
The TLS version is hooked to your SSL certificate installation.
IF your hosting server is a shared server, you'd better make darn certain that the server uses TLS v1.2 ONLY for SSL.
IF, as is our situation, you are on a dedicated server, you can get your tech support to remove TLS v.1o and TLS v 1.1 from your SSL installation.
Our current setup is SSL v 3, TLS v.12 and Hikashop Business v 3.2.2 using the Authorize.net payment plugin with the AIM method.
I had to spend several hours to dig up all of this info, and I think that it should be more available and better documented.
Hope that this helps !
Regards,
Kent