How do i pass -var-file on Teffaform cloud

@apparentlymart Thats great. Thank you for your response.

I was able to use backend, and create multiple workspace on Terraform cloud.
One thing i am still seeing issue with is using terraform.tfvars

I have defined all the environment specific variable on Cloud, and left a variable value in terraform.tfvars which will be consistent everywhere (I am just testing for now).

Variable defination file - win-variables.tf

variable “windows_admin_username” {
type = string
description = “”
}

Value is defined in terraform.tfvars
windows_admin_username = “localadminstrator”

However, I still see issue when run the plan:

Does that mean its not reading variable from terraform.tfvars file?