diff --git a/vpc-transit-gateway-association/self/associate.tf b/vpc-transit-gateway-association/self/associate.tf
index 70fb1b5..9c0fcc8 100644
--- a/vpc-transit-gateway-association/self/associate.tf
+++ b/vpc-transit-gateway-association/self/associate.tf
@@ -1,3 +1,10 @@
+locals {
+  attachment_tags = {
+    Name                  = format("%v:%v", data.aws_iam_account_alias.current.account_alias, var.vpc_full_name)
+    "boc:tgw_environment" = var.transit_gateway_environment
+  }
+}
+
 #---
 # attach this vpc to tgw (my region, my account)
 #---
@@ -14,17 +21,16 @@ resource "aws_ec2_transit_gateway_vpc_attachment" "vpc_attachment" {
 
   tags = merge(
     local.base_tags,
-    {
-      Name                  = format("tgwa-%v-%v-%v", var.transit_gateway_label, var.vpc_full_name, local.region),
-      "boc:tgw_environment" = var.transit_gateway_environment,
-    },
+    var.tags,
+    local.attachment_tags,
   )
 }
 
 # tag in network account with passed-in tags, plus Name=current_account:vpc_name
+# if this is the network account, no need to add the additional tags as they are already there
 resource "aws_ec2_tag" "vpc_attachment" {
   provider = aws.self
-  for_each = merge(var.tags, { Name = format("%v:%v", data.aws_iam_account_alias.current.account_alias, var.vpc_full_name) })
+  for_each = ! local.self_is_network_account ? merge(local.base_tags, var.tags, local.attachment_tags) : {}
 
   resource_id = aws_ec2_transit_gateway_vpc_attachment.vpc_attachment.id
   key         = each.key
diff --git a/vpc-transit-gateway-association/self/main.tf b/vpc-transit-gateway-association/self/main.tf
index e3338c8..762caf3 100644
--- a/vpc-transit-gateway-association/self/main.tf
+++ b/vpc-transit-gateway-association/self/main.tf
@@ -44,10 +44,11 @@
 */
 
 locals {
-  account_id          = var.account_id != "" ? var.account_id : data.aws_caller_identity.current.account_id
-  account_environment = data.aws_arn.current.partition == "aws-us-gov" ? "gov" : "ew"
-  region              = data.aws_region.current.name
-  region_short        = join("", [for c in split("-", local.region) : substr(c, 0, 1)])
+  account_id              = var.account_id != "" ? var.account_id : data.aws_caller_identity.current.account_id
+  account_environment     = data.aws_arn.current.partition == "aws-us-gov" ? "gov" : "ew"
+  region                  = data.aws_region.current.name
+  region_short            = join("", [for c in split("-", local.region) : substr(c, 0, 1)])
+  self_is_network_account = data.aws_caller_identity.current.account_id == data.aws_caller_identity.network_account.account_id
 
   base_tags = {
     "boc:tf_module_version" = local._module_version