diff --git a/ynab/transactions.go b/ynab/transactions.go
index f1d6047..5ea3978 100644
--- a/ynab/transactions.go
+++ b/ynab/transactions.go
@@ -31,7 +31,7 @@ type BaseTransaction struct {
 	Deleted               bool        `json:"deleted,omitempty"`
 }
 
-// Used for single transaction requests / responses
+// Used for single transaction responses
 type Transaction struct {
 	Data struct {
 		TransactionIDs  []string        `json:"transaction_ids,omitempty"`
@@ -40,6 +40,7 @@ type Transaction struct {
 	}
 }
 
+// Used for single transaction requests
 type TransactionRequest struct {
 	Transaction BaseTransaction `json:"transaction,omitempty"`
 }
@@ -104,7 +105,7 @@ func (c *Client) CreateTodayYNABCapitalGainsTransaction(accountID string, amount
 	return nil
 }
 
-// Accepts a YNAB account ID and transaction amount and creates a new YNAB transaction
+// Accepts a YNAB account ID, transaction ID and transaction amount and updates the YNAB transaction with the matching ID
 func (c *Client) UpdateTodayYNABCapitalGainsTransaction(accountID string, transactionID string, amount int) error {
 	transaction := TransactionRequest{}
 	transaction.Transaction.AccountID = accountID