diff --git a/homeassistant/components/remember_the_milk/__init__.py b/homeassistant/components/remember_the_milk/__init__.py
index 8e8127bd29b..fb0a9d5106f 100644
--- a/homeassistant/components/remember_the_milk/__init__.py
+++ b/homeassistant/components/remember_the_milk/__init__.py
@@ -7,7 +7,7 @@ from rtmapi import Rtm, RtmRequestFailedException
 import voluptuous as vol
 
 from homeassistant.const import CONF_API_KEY, CONF_ID, CONF_NAME, CONF_TOKEN, STATE_OK
-from homeassistant.core import HomeAssistant
+from homeassistant.core import HomeAssistant, ServiceCall
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity import Entity
 from homeassistant.helpers.entity_component import EntityComponent
@@ -270,7 +270,7 @@ class RememberTheMilk(Entity):
             self._token_valid = True
         return self._token_valid
 
-    def create_task(self, call):
+    def create_task(self, call: ServiceCall) -> None:
         """Create a new task on Remember The Milk.
 
         You can use the smart syntax to define the attributes of a new task,
@@ -278,7 +278,7 @@ class RememberTheMilk(Entity):
         due date to today.
         """
         try:
-            task_name = call.data.get(CONF_NAME)
+            task_name = call.data[CONF_NAME]
             hass_id = call.data.get(CONF_ID)
             rtm_id = None
             if hass_id is not None:
@@ -320,12 +320,10 @@ class RememberTheMilk(Entity):
                 self._name,
                 rtm_exception,
             )
-            return False
-        return True
 
-    def complete_task(self, call):
+    def complete_task(self, call: ServiceCall) -> None:
         """Complete a task that was previously created by this component."""
-        hass_id = call.data.get(CONF_ID)
+        hass_id = call.data[CONF_ID]
         rtm_id = self._rtm_config.get_rtm_id(self._name, hass_id)
         if rtm_id is None:
             _LOGGER.error(
@@ -334,7 +332,7 @@ class RememberTheMilk(Entity):
                 hass_id,
                 self._name,
             )
-            return False
+            return
         try:
             result = self._rtm_api.rtm.timelines.create()
             timeline = result.timeline.value
@@ -354,7 +352,6 @@ class RememberTheMilk(Entity):
                 self._name,
                 rtm_exception,
             )
-        return True
 
     @property
     def name(self):