diff --git a/lib/stripe/checkout/session.ex b/lib/stripe/checkout/session.ex
index 95de969c..ec87fd05 100644
--- a/lib/stripe/checkout/session.ex
+++ b/lib/stripe/checkout/session.ex
@@ -13,6 +13,137 @@ defmodule Stripe.Session do
   use Stripe.Entity
   import Stripe.Request
 
+  @type customer_update_param :: %{
+          optional(:address) => String.t(),
+          optional(:name) => String.t(),
+          optional(:shipping) => String.t()
+        }
+
+  @type discount_param :: %{
+          optional(:coupon) => String.t(),
+          optional(:promotion_code) => String.t()
+        }
+
+  @type setup_intent_data :: %{
+          optional(:description) => String.t(),
+          optional(:metadata) => Stripe.Types.metadata(),
+          optional(:on_behalf_of) => String.t()
+        }
+
+  @type shipping_address_collection :: %{
+          allowed_countries: [String.t()]
+        }
+
+  @typedoc """
+  For sessions in `payment` mode only.
+  One of `"auto"`, `"pay"`, `"book"`, or `"donate"`.
+  """
+  @type submit_type :: String.t()
+
+  @type breakdown_discount :: %{
+          amount: integer(),
+          discount: Stripe.Discount.t()
+        }
+
+  @type breakdown_tax :: %{
+          amount: integer(),
+          rate: Stripe.TaxID.t()
+        }
+
+  @type total_details :: %{
+          :amount_discount => integer(),
+          :amount_shipping => integer(),
+          :amount_tax => integer(),
+          optional(:breakdown) => %{
+            discounts: [breakdown_discount()],
+            taxes: [breakdown_tax()]
+          }
+        }
+
+  @type tax_id_collection :: %{
+          enabled: boolean()
+        }
+
+  @typedoc """
+  One of `"personal"` or  "business"`.
+  """
+  @type acss_mandate_transaction_type :: String.t()
+
+  @typedoc """
+  One of `"interval"`, `"sporadic"`, or  "combined"`.
+  """
+  @type acss_mandate_payment_schedule :: String.t()
+
+  @type acss_mandate_options :: %{
+          url: String.t(),
+          default_for: [String.t()],
+          interval_description: String.t() | nil,
+          payment_schedule: acss_mandate_payment_schedule() | nil,
+          transaction_type: acss_mandate_transaction_type()
+        }
+
+  @typedoc """
+  One of `"automatic"`, `"instant"`, or  "microdeposits"`.
+  """
+  @type acss_verification_method :: String.t()
+
+  @type acss_debit :: %{
+          currency: String.t() | nil,
+          mandate_options: acss_mandate_options() | nil,
+          verification_method: acss_verification_method()
+        }
+
+  @type boleto :: %{
+          expires_after_days: non_neg_integer() | nil
+        }
+
+  @type oxxo :: %{
+          expires_after_days: non_neg_integer() | nil
+        }
+
+  @type payment_method_options :: %{
+          acss_debit: acss_debit() | nil,
+          boleto: boleto() | nil,
+          oxxo: oxxo() | nil
+        }
+
+  @type customer_details :: %{
+          email: String.t() | nil,
+          tax_exempt: String.t() | nil,
+          tax_ids: [Stripe.TaxID.tax_id_data()]
+        }
+
+  @type consent :: %{
+          promotions: String.t()
+        }
+
+  @type consent_collection :: %{
+          promotions: String.t()
+        }
+
+  @typedoc """
+  One of `"requires_location_inputs"`, `"complete"`, `"failed"`.
+  """
+  @type automatic_tax_status :: String.t()
+
+  @type automatic_tax :: %{
+          enabled: boolean(),
+          status: automatic_tax_status() | nil
+        }
+
+  @type automatic_tax_param :: %{
+          enabled: boolean()
+        }
+
+  @type expiration :: %{
+          optional(:recovery) => %{
+            optional(:allow_promotion_codes) => boolean(),
+            optional(:enabled) => boolean(),
+            :expires_at => Stripe.timestamp(),
+            :url => String.t()
+          }
+        }
+
   @type line_item :: %{
           optional(:name) => String.t(),
           optional(:quantity) => integer(),
@@ -100,61 +231,109 @@ defmodule Stripe.Session do
           optional(:line_items) => list(line_item),
           optional(:locale) => String.t(),
           optional(:metadata) => Stripe.Types.metadata(),
+          optional(:after_expiration) => expiration(),
+          optional(:allow_promotion_codes) => boolean(),
+          optional(:automatic_tax) => automatic_tax_param(),
+          optional(:consent_collection) => consent_collection(),
+          optional(:customer_update) => customer_update_param(),
+          optional(:discounts) => [discount_param()],
+          optional(:expires_at) => Stripe.timestamp(),
           optional(:payment_intent_data) => payment_intent_data,
-          optional(:subscription_data) => subscription_data
+          optional(:payment_method_options) => payment_method_options(),
+          optional(:setup_intent_data) => setup_intent_data(),
+          optional(:shipping_address_collection) => shipping_address_collection(),
+          optional(:submit_type) => submit_type(),
+          optional(:subscription_data) => subscription_data,
+          optional(:tax_id_collection) => tax_id_collection()
         }
 
+  @typedoc """
+  One of `"payment"`, `"setup"`, or `"subscription"`.
+  """
+  @type mode :: String.t()
+
+  @typedoc """
+  One of `"paid"`, `"unpaid"`, or `"no_payment_required"`.
+  """
+  @type payment_status :: String.t()
+
   @type t :: %__MODULE__{
           id: Stripe.id(),
           object: String.t(),
+          after_expiration: expiration() | nil,
+          allow_promotion_codes: boolean() | nil,
+          amount_subtotal: integer() | nil,
+          amount_total: integer() | nil,
+          automatic_tax: automatic_tax(),
           billing_address_collection: String.t(),
           cancel_url: boolean(),
           client_reference_id: String.t(),
+          consent: consent() | nil,
+          consent_collection: consent_collection() | nil,
+          currency: String.t(),
           customer: Stripe.id() | Stripe.Customer.t() | nil,
+          customer_details: customer_details() | nil,
           customer_email: String.t(),
           display_items: list(line_item),
+          expires_at: Stripe.timestamp() | nil,
           livemode: boolean(),
           locale: boolean(),
           metadata: Stripe.Types.metadata(),
-          mode: String.t(),
+          mode: mode(),
           payment_intent: Stripe.id() | Stripe.PaymentIntent.t() | nil,
+          payment_method_options: payment_method_options() | nil,
           payment_method_types: list(String.t()),
+          payment_status: payment_status(),
+          recovered_from: Stripe.id() | nil,
           setup_intent: Stripe.id() | Stripe.SetupIntent.t() | nil,
           shipping: %{
             address: Stripe.Types.shipping(),
             name: String.t()
           },
-          shipping_address_collection: %{
-            allowed_countries: [String.t()]
-          },
-          submit_type: String.t() | nil,
+          shipping_address_collection: shipping_address_collection(),
+          submit_type: submit_type() | nil,
           subscription: Stripe.id() | Stripe.Subscription.t() | nil,
           success_url: String.t(),
-          url: String.t(),
-          payment_status: String.t()
+          tax_id_collection: tax_id_collection() | nil,
+          total_details: total_details() | nil,
+          url: String.t()
         }
 
   defstruct [
     :id,
     :object,
+    :after_expiration,
+    :allow_promotion_codes,
+    :amount_subtotal,
+    :amount_total,
+    :automatic_tax,
     :billing_address_collection,
     :cancel_url,
     :client_reference_id,
+    :consent,
+    :consent_collection,
+    :currency,
     :customer,
+    :customer_details,
     :customer_email,
     :display_items,
+    :expires_at,
     :livemode,
     :locale,
     :metadata,
     :mode,
     :payment_intent,
+    :payment_method_options,
     :payment_method_types,
+    :recovered_from,
     :setup_intent,
     :shipping,
     :shipping_address_collection,
     :submit_type,
     :subscription,
     :success_url,
+    :tax_id_collection,
+    :total_details,
     :url,
     :payment_status
   ]