Hi @Kapil_Bisht
Were your issues solved? If not, this is a list of Shopify tax setting instructions I found on the Avada website.
I hope it could help you.
Avada is an e-commerce solution provider based in the heart of Vietnam where the best developers unite. Founded in 2017 by Mageplaza, Avada is responsible to complete the mission to help 1 million online businesses grow revenues.