diff --git a/homeassistant/components/airtouch4/climate.py b/homeassistant/components/airtouch4/climate.py
index 5bac0c7c9a3..e14130d3b31 100644
--- a/homeassistant/components/airtouch4/climate.py
+++ b/homeassistant/components/airtouch4/climate.py
@@ -1,4 +1,5 @@
 """AirTouch 4 component to control of AirTouch 4 Climate Devices."""
+from __future__ import annotations
 
 import logging
 
@@ -19,9 +20,11 @@ from homeassistant.components.climate.const import (
     SUPPORT_FAN_MODE,
     SUPPORT_TARGET_TEMPERATURE,
 )
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import ATTR_TEMPERATURE, TEMP_CELSIUS
-from homeassistant.core import callback
+from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.entity import DeviceInfo
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.update_coordinator import CoordinatorEntity
 
 from .const import DOMAIN
@@ -63,14 +66,21 @@ HA_FAN_SPEED_TO_AT = {value: key for key, value in AT_TO_HA_FAN_SPEED.items()}
 _LOGGER = logging.getLogger(__name__)
 
 
-async def async_setup_entry(hass, config_entry, async_add_entities):
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
     """Set up the Airtouch 4."""
     coordinator = hass.data[DOMAIN][config_entry.entry_id]
     info = coordinator.data
-    entities = [
+    entities: list[ClimateEntity] = [
         AirtouchGroup(coordinator, group["group_number"], info)
         for group in info["groups"]
-    ] + [AirtouchAC(coordinator, ac["ac_number"], info) for ac in info["acs"]]
+    ]
+    entities.extend(
+        AirtouchAC(coordinator, ac["ac_number"], info) for ac in info["acs"]
+    )
 
     _LOGGER.debug(" Found entities %s", entities)
 
diff --git a/homeassistant/components/alpha_vantage/sensor.py b/homeassistant/components/alpha_vantage/sensor.py
index 583485ca703..c46c33a8dc8 100644
--- a/homeassistant/components/alpha_vantage/sensor.py
+++ b/homeassistant/components/alpha_vantage/sensor.py
@@ -1,4 +1,6 @@
 """Stock market information from Alpha Vantage."""
+from __future__ import annotations
+
 from datetime import timedelta
 import logging
 
@@ -8,7 +10,10 @@ import voluptuous as vol
 
 from homeassistant.components.sensor import PLATFORM_SCHEMA, SensorEntity
 from homeassistant.const import ATTR_ATTRIBUTION, CONF_API_KEY, CONF_CURRENCY, CONF_NAME
+from homeassistant.core import HomeAssistant
 import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -61,7 +66,12 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
 )
 
 
-def setup_platform(hass, config, add_entities, discovery_info=None):
+def setup_platform(
+    hass: HomeAssistant,
+    config: ConfigType,
+    add_entities: AddEntitiesCallback,
+    discovery_info: DiscoveryInfoType | None = None,
+) -> None:
     """Set up the Alpha Vantage sensor."""
     api_key = config[CONF_API_KEY]
     symbols = config.get(CONF_SYMBOLS, [])
@@ -75,7 +85,7 @@ def setup_platform(hass, config, add_entities, discovery_info=None):
 
     timeseries = TimeSeries(key=api_key)
 
-    dev = []
+    dev: list[SensorEntity] = []
     for symbol in symbols:
         try:
             _LOGGER.debug("Configuring timeseries for symbols: %s", symbol[CONF_SYMBOL])
diff --git a/homeassistant/components/anel_pwrctrl/switch.py b/homeassistant/components/anel_pwrctrl/switch.py
index 2f4ce0ee7db..f4a5ca32c3c 100644
--- a/homeassistant/components/anel_pwrctrl/switch.py
+++ b/homeassistant/components/anel_pwrctrl/switch.py
@@ -1,4 +1,6 @@
 """Support for ANEL PwrCtrl switches."""
+from __future__ import annotations
+
 from datetime import timedelta
 import logging
 
@@ -7,7 +9,10 @@ import voluptuous as vol
 
 from homeassistant.components.switch import PLATFORM_SCHEMA, SwitchEntity
 from homeassistant.const import CONF_HOST, CONF_PASSWORD, CONF_USERNAME
+from homeassistant.core import HomeAssistant
 import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 from homeassistant.util import Throttle
 
 _LOGGER = logging.getLogger(__name__)
@@ -28,7 +33,12 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
 )
 
 
-def setup_platform(hass, config, add_entities, discovery_info=None):
+def setup_platform(
+    hass: HomeAssistant,
+    config: ConfigType,
+    add_entities: AddEntitiesCallback,
+    discovery_info: DiscoveryInfoType | None = None,
+) -> None:
     """Set up PwrCtrl devices/switches."""
     host = config.get(CONF_HOST)
     username = config[CONF_USERNAME]
@@ -46,9 +56,9 @@ def setup_platform(hass, config, add_entities, discovery_info=None):
         master.query(ip_addr=host)
     except OSError as ex:
         _LOGGER.error("Unable to discover PwrCtrl device: %s", str(ex))
-        return False
+        return
 
-    devices = []
+    devices: list[SwitchEntity] = []
     for device in master.devices.values():
         parent_device = PwrCtrlDevice(device)
         devices.extend(
diff --git a/homeassistant/components/api/__init__.py b/homeassistant/components/api/__init__.py
index d2201ccace0..c21919d22f7 100644
--- a/homeassistant/components/api/__init__.py
+++ b/homeassistant/components/api/__init__.py
@@ -28,10 +28,12 @@ from homeassistant.const import (
     URL_API_TEMPLATE,
 )
 import homeassistant.core as ha
+from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ServiceNotFound, TemplateError, Unauthorized
 from homeassistant.helpers import template
 from homeassistant.helpers.json import JSONEncoder
 from homeassistant.helpers.service import async_get_all_descriptions
+from homeassistant.helpers.typing import ConfigType
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -49,7 +51,7 @@ STREAM_PING_PAYLOAD = "ping"
 STREAM_PING_INTERVAL = 50  # seconds
 
 
-async def async_setup(hass, config):
+async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     """Register the API with the HTTP interface."""
     hass.http.register_view(APIStatusView)
     hass.http.register_view(APIEventStream)
diff --git a/homeassistant/components/arest/switch.py b/homeassistant/components/arest/switch.py
index 97a763cb652..f8c45313d52 100644
--- a/homeassistant/components/arest/switch.py
+++ b/homeassistant/components/arest/switch.py
@@ -1,4 +1,5 @@
 """Support for an exposed aREST RESTful API of a device."""
+from __future__ import annotations
 
 from http import HTTPStatus
 import logging
@@ -8,7 +9,10 @@ import voluptuous as vol
 
 from homeassistant.components.switch import PLATFORM_SCHEMA, SwitchEntity
 from homeassistant.const import CONF_NAME, CONF_RESOURCE
+from homeassistant.core import HomeAssistant
 import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -39,7 +43,12 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
 )
 
 
-def setup_platform(hass, config, add_entities, discovery_info=None):
+def setup_platform(
+    hass: HomeAssistant,
+    config: ConfigType,
+    add_entities: AddEntitiesCallback,
+    discovery_info: DiscoveryInfoType | None = None,
+) -> None:
     """Set up the aREST switches."""
     resource = config[CONF_RESOURCE]
 
@@ -49,12 +58,12 @@ def setup_platform(hass, config, add_entities, discovery_info=None):
         _LOGGER.error(
             "Missing resource or schema in configuration. Add http:// to your URL"
         )
-        return False
+        return
     except requests.exceptions.ConnectionError:
         _LOGGER.error("No route to device at %s", resource)
-        return False
+        return
 
-    dev = []
+    dev: list[SwitchEntity] = []
     pins = config[CONF_PINS]
     for pinnum, pin in pins.items():
         dev.append(
diff --git a/homeassistant/components/asterisk_mbox/__init__.py b/homeassistant/components/asterisk_mbox/__init__.py
index ca511267302..607daad5b54 100644
--- a/homeassistant/components/asterisk_mbox/__init__.py
+++ b/homeassistant/components/asterisk_mbox/__init__.py
@@ -10,10 +10,11 @@ from asterisk_mbox.commands import (
 import voluptuous as vol
 
 from homeassistant.const import CONF_HOST, CONF_PASSWORD, CONF_PORT
-from homeassistant.core import callback
+from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers import discovery
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.dispatcher import async_dispatcher_send, dispatcher_connect
+from homeassistant.helpers.typing import ConfigType
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -39,9 +40,9 @@ CONFIG_SCHEMA = vol.Schema(
 )
 
 
-def setup(hass, config):
+def setup(hass: HomeAssistant, config: ConfigType) -> bool:
     """Set up for the Asterisk Voicemail box."""
-    conf = config.get(DOMAIN)
+    conf = config[DOMAIN]
 
     host = conf[CONF_HOST]
     port = conf[CONF_PORT]