diff --git a/api/app/controllers/mno_enterprise/jpi/v1/admin/invoices_controller.rb b/api/app/controllers/mno_enterprise/jpi/v1/admin/invoices_controller.rb
index 2f66ae8a8..77a336c8f 100644
--- a/api/app/controllers/mno_enterprise/jpi/v1/admin/invoices_controller.rb
+++ b/api/app/controllers/mno_enterprise/jpi/v1/admin/invoices_controller.rb
@@ -28,7 +28,7 @@ def index
     def show
       @invoice = MnoEnterprise::Invoice
         .with_params(_metadata: { act_as_manager: current_user.id })
-        .select(:id, :price, :started_at, :ended_at, :created_at, :updated_at, :paid_at, :slug, :tax_pips_applied,
+        .select(:id, :price, :started_at, :ended_at, :created_at, :updated_at, :paid_at, :slug, :tax_pips_applied, :previous_total_due, :tax_payable,
           :organization, { organizations: [:id, :name] },
           :bills, bills: [:id, :adjustment, :billing_group, :end_user_price_cents, :currency, :description,
             :closed_end_user_price, :closure_exchange_rate])
@@ -74,10 +74,10 @@ def create_adjustment
 
       bill.save!
       # Refetch invoice totals
-      invoice = MnoEnterprise::Invoice.select(:price, :total_due).find(params[:id]).first
+      invoice = MnoEnterprise::Invoice.select(:price, :total_due, :tax_payable).find(params[:id]).first
 
       # Render invoice totals
-      render json: { id: bill.id, invoice: { price: invoice.price, total_due: invoice.total_due } }
+      render json: { id: bill.id, invoice: { price: invoice.price, total_due: invoice.total_due, tax_payable: invoice.tax_payable } }
     end
 
     # NOTE: it would be preferable to use Invoice#price_cents
@@ -101,10 +101,10 @@ def delete_adjustment
       # instead of cancelled.
       bill.destroy!
       # Refetch invoice totals
-      invoice = MnoEnterprise::Invoice.select(:price, :total_due).find(params[:id]).first
+      invoice = MnoEnterprise::Invoice.select(:price, :total_due, :tax_payable).find(params[:id]).first
 
       # Render invoice totals
-      render json: { invoice: { price: invoice.price, total_due: invoice.total_due } }
+      render json: { invoice: { price: invoice.price, total_due: invoice.total_due, tax_payable: invoice.tax_payable } }
 
     end
 
diff --git a/api/app/views/mno_enterprise/jpi/v1/admin/invoices/show.json.jbuilder b/api/app/views/mno_enterprise/jpi/v1/admin/invoices/show.json.jbuilder
index 32398c3b2..26fc33a44 100644
--- a/api/app/views/mno_enterprise/jpi/v1/admin/invoices/show.json.jbuilder
+++ b/api/app/views/mno_enterprise/jpi/v1/admin/invoices/show.json.jbuilder
@@ -1,5 +1,5 @@
 json.invoice do
-  json.extract! @invoice, :id, :price, :started_at, :ended_at, :created_at, :updated_at, :paid_at, :slug, :tax_pips_applied
+  json.extract! @invoice, :id, :price, :started_at, :ended_at, :created_at, :updated_at, :paid_at, :slug, :tax_pips_applied, :previous_total_due, :tax_payable
   json.organization @invoice.organization, :id, :name
 
   json.adjustments @invoice.bills.select(&:adjustment) do |bill|
diff --git a/api/spec/controllers/mno_enterprise/jpi/v1/admin/invoices_controller_spec.rb b/api/spec/controllers/mno_enterprise/jpi/v1/admin/invoices_controller_spec.rb
index 7cbe44505..ec0514219 100644
--- a/api/spec/controllers/mno_enterprise/jpi/v1/admin/invoices_controller_spec.rb
+++ b/api/spec/controllers/mno_enterprise/jpi/v1/admin/invoices_controller_spec.rb
@@ -47,7 +47,7 @@ module MnoEnterprise
       let(:select_fields) do
         {
           bills: 'id,adjustment,billing_group,end_user_price_cents,currency,description,closed_end_user_price,closure_exchange_rate',
-          invoices: 'id,price,started_at,ended_at,created_at,updated_at,paid_at,slug,tax_pips_applied,organization,bills',
+          invoices: 'id,price,started_at,ended_at,created_at,updated_at,paid_at,slug,tax_pips_applied,previous_total_due,tax_payable,organization,bills',
           organizations: 'id,name'
         }
       end
@@ -82,12 +82,13 @@ module MnoEnterprise
       before { allow(invoice).to receive(:organization).and_return(organization) }
       before { stub_api_v2(:get, "/invoices/#{invoice.id}", invoice, %i(organization), expected_params) }
       before { stub_api_v2(:post, "/bills", bill) }
-      before { stub_api_v2(:get, "/invoices/#{invoice.id}", invoice, [], { fields: { invoices: 'price,total_due' } }) }
+      before { stub_api_v2(:get, "/invoices/#{invoice.id}", invoice, [], { fields: { invoices: 'price,total_due,tax_payable' } }) }
       before { subject }
 
       it { expect(data['id']).to eq(bill.id) }
       it { expect(data['invoice']['total_due']['fractional']).to eq(invoice.total_due.cents.to_f.to_s) }
       it { expect(data['invoice']['price']['fractional']).to eq(invoice.price.cents.to_f.to_s) }
+      it { expect(data['invoice']['tax_payable']['fractional']).to eq(invoice.tax_payable.cents.to_f.to_s) }
     end
 
     describe 'DELETE #delete_adjustment' do
@@ -106,11 +107,12 @@ module MnoEnterprise
           })
       end
       before { stub_api_v2(:delete, "/bills/#{bill.id}") }
-      before { stub_api_v2(:get, "/invoices/#{invoice.id}", invoice, [], { fields: { invoices: 'price,total_due' } }) }
+      before { stub_api_v2(:get, "/invoices/#{invoice.id}", invoice, [], { fields: { invoices: 'price,total_due,tax_payable' } }) }
       before { subject }
 
       it { expect(data['invoice']['total_due']['fractional']).to eq(invoice.total_due.cents.to_f.to_s) }
       it { expect(data['invoice']['price']['fractional']).to eq(invoice.price.cents.to_f.to_s) }
+      it { expect(data['invoice']['tax_payable']['fractional']).to eq(invoice.tax_payable.cents.to_f.to_s) }
     end
 
     describe 'POST #send_to_customer' do