diff --git a/plugins/woocommerce-admin/client/dashboard/task-list/tasks/tax.js b/plugins/woocommerce-admin/client/dashboard/task-list/tasks/tax.js
index b0b9912c953..9c07c6cf452 100644
--- a/plugins/woocommerce-admin/client/dashboard/task-list/tasks/tax.js
+++ b/plugins/woocommerce-admin/client/dashboard/task-list/tasks/tax.js
@@ -107,10 +107,12 @@ class Tax extends Component {
 
 	isTaxJarSupported() {
 		const { countryCode, wc_connect_options } = this.props;
-		const { automatedTaxSupportedCountries = [] } = getSetting( 'onboarding', {} );
+		const { automatedTaxSupportedCountries = [], taxJarActivated } = getSetting( 'onboarding', {} );
 
 		return (
-			wc_connect_options.tos_accepted && automatedTaxSupportedCountries.includes( countryCode )
+			! taxJarActivated && // WCS integration doesn't work with the official TaxJar plugin.
+			wc_connect_options.tos_accepted &&
+			automatedTaxSupportedCountries.includes( countryCode )
 		);
 	}
 
diff --git a/plugins/woocommerce-admin/src/Features/OnboardingTasks.php b/plugins/woocommerce-admin/src/Features/OnboardingTasks.php
index 49508e440f9..c7c73aa4997 100644
--- a/plugins/woocommerce-admin/src/Features/OnboardingTasks.php
+++ b/plugins/woocommerce-admin/src/Features/OnboardingTasks.php
@@ -95,6 +95,7 @@ class OnboardingTasks {
 		$settings['onboarding']['hasProducts']                    = self::check_task_completion( 'products' );
 		$settings['onboarding']['isTaxComplete']                  = self::check_task_completion( 'tax' );
 		$settings['onboarding']['shippingZonesCount']             = count( \WC_Shipping_Zones::get_zones() );
+		$settings['onboarding']['taxJarActivated']                = class_exists( 'WC_Taxjar' );
 
 		return $settings;
 	}