diff --git a/plugins/woocommerce-admin/src/API/OnboardingPlugins.php b/plugins/woocommerce-admin/src/API/OnboardingPlugins.php
index ad8615776fe..05d4193cebb 100644
--- a/plugins/woocommerce-admin/src/API/OnboardingPlugins.php
+++ b/plugins/woocommerce-admin/src/API/OnboardingPlugins.php
@@ -160,7 +160,7 @@ class OnboardingPlugins extends \WC_REST_Data_Controller {
 	 * Installs the requested plugin.
 	 *
 	 * @param  WP_REST_Request $request Full details about the request.
-	 * @return array Plugin Status
+	 * @return WP_Error|array Plugin Status
 	 */
 	public function install_plugin( $request ) {
 		$allowed_plugins = Onboarding::get_allowed_plugins();
@@ -234,7 +234,7 @@ class OnboardingPlugins extends \WC_REST_Data_Controller {
 	 * Activate the requested plugin.
 	 *
 	 * @param  WP_REST_Request $request Full details about the request.
-	 * @return array Plugin Status
+	 * @return WP_Error|array Plugin Status
 	 */
 	public function activate_plugins( $request ) {
 		$allowed_plugins = Onboarding::get_allowed_plugins();
@@ -274,7 +274,7 @@ class OnboardingPlugins extends \WC_REST_Data_Controller {
 	 * Generates a Jetpack Connect URL.
 	 *
 	 * @param  WP_REST_Request $request Full details about the request.
-	 * @return array Connection URL for Jetpack
+	 * @return WP_Error|array Connection URL for Jetpack
 	 */
 	public function connect_jetpack( $request ) {
 		if ( ! class_exists( '\Jetpack' ) ) {
@@ -298,7 +298,7 @@ class OnboardingPlugins extends \WC_REST_Data_Controller {
 	/**
 	 *  Kicks off the WCCOM Connect process.
 	 *
-	 * @return array Connection URL for WooCommerce.com
+	 * @return WP_Error|array Connection URL for WooCommerce.com
 	 */
 	public function request_wccom_connect() {
 		include_once WC_ABSPATH . 'includes/admin/helper/class-wc-helper-api.php';
@@ -358,7 +358,7 @@ class OnboardingPlugins extends \WC_REST_Data_Controller {
 	 * Finishes connecting to WooCommerce.com.
 	 *
 	 * @param  object $rest_request Request details.
-	 * @return array Contains success status.
+	 * @return WP_Error|array Contains success status.
 	 */
 	public function finish_wccom_connect( $rest_request ) {
 		include_once WC_ABSPATH . 'includes/admin/helper/class-wc-helper.php';
@@ -419,7 +419,7 @@ class OnboardingPlugins extends \WC_REST_Data_Controller {
 	/**
 	 * Returns a URL that can be used to connect to PayPal.
 	 *
-	 * @return array Connect URL.
+	 * @return WP_Error|array Connect URL.
 	 */
 	public function connect_paypal() {
 		if ( ! function_exists( 'wc_gateway_ppec' ) ) {
@@ -450,7 +450,7 @@ class OnboardingPlugins extends \WC_REST_Data_Controller {
 	/**
 	 * Returns a URL that can be used to connect to Square.
 	 *
-	 * @return array Connect URL.
+	 * @return WP_Error|array Connect URL.
 	 */
 	public function connect_square() {
 		if ( ! class_exists( '\WooCommerce\Square\Handlers\Connection' ) ) {
diff --git a/plugins/woocommerce-admin/src/API/OnboardingTasks.php b/plugins/woocommerce-admin/src/API/OnboardingTasks.php
index 843d3e83922..2416499a8bc 100644
--- a/plugins/woocommerce-admin/src/API/OnboardingTasks.php
+++ b/plugins/woocommerce-admin/src/API/OnboardingTasks.php
@@ -394,6 +394,8 @@ class OnboardingTasks extends \WC_REST_Data_Controller {
 
 	/**
 	 * Create a homepage from a template.
+	 *
+	 * @return WP_Error|array
 	 */
 	public static function create_homepage() {
 		$post_id = wp_insert_post(
diff --git a/plugins/woocommerce-admin/src/Features/Onboarding.php b/plugins/woocommerce-admin/src/Features/Onboarding.php
index c70af574b8e..f5233e72c70 100644
--- a/plugins/woocommerce-admin/src/Features/Onboarding.php
+++ b/plugins/woocommerce-admin/src/Features/Onboarding.php
@@ -261,7 +261,7 @@ class Onboarding {
 	}
 
 	/**
-	 * Check if theme has declared support for WooCommerce
+	 * Check if theme has declared support for WooCommerce.
 	 *
 	 * @param WP_Theme $theme Theme to check.
 	 * @return bool
@@ -470,6 +470,7 @@ class Onboarding {
 	/**
 	 * Gets an array of plugins that can be installed & activated via the onboarding wizard.
 	 *
+	 * @return array
 	 * @todo Handle edgecase of where installed plugins may have versioned folder names (i.e. `jetpack-master/jetpack.php`).
 	 */
 	public static function get_allowed_plugins() {
diff --git a/plugins/woocommerce-admin/src/Features/OnboardingTasks.php b/plugins/woocommerce-admin/src/Features/OnboardingTasks.php
index 321d8c31c69..7fc64fafa3c 100644
--- a/plugins/woocommerce-admin/src/Features/OnboardingTasks.php
+++ b/plugins/woocommerce-admin/src/Features/OnboardingTasks.php
@@ -75,6 +75,7 @@ class OnboardingTasks {
 	 * Add task items to component settings.
 	 *
 	 * @param array $settings Component settings.
+	 * @return array
 	 */
 	public function component_settings( $settings ) {
 		$products = wp_count_posts( 'product' );
@@ -130,6 +131,8 @@ class OnboardingTasks {
 
 	/**
 	 * Check for active task completion, and clears the transient.
+	 *
+	 * @return bool
 	 */
 	public static function is_active_task_complete() {
 		$active_task = self::get_active_task();
@@ -150,7 +153,7 @@ class OnboardingTasks {
 	 * Check for task completion of a given task.
 	 *
 	 * @param string $task Name of task.
-	 * @return bool;
+	 * @return bool
 	 */
 	public static function check_task_completion( $task ) {
 		switch ( $task ) {