diff --git a/pylib/anki/tags.py b/pylib/anki/tags.py
index 864c86b11..cfbb9d62e 100644
--- a/pylib/anki/tags.py
+++ b/pylib/anki/tags.py
@@ -13,7 +13,7 @@ from __future__ import annotations
 
 import json
 import re
-from typing import Callable, Dict, List, Tuple
+from typing import Callable, Collection, Dict, List, Optional, Tuple
 
 import anki  # pylint: disable=unused-import
 from anki import hooks
@@ -29,7 +29,7 @@ class TagManager:
         self.col = col
         self.tags: Dict[str, int] = {}
 
-    def load(self, json_) -> None:
+    def load(self, json_: str) -> None:
         self.tags = json.loads(json_)
         self.changed = False
 
@@ -41,7 +41,7 @@ class TagManager:
     # Registering and fetching tags
     #############################################################
 
-    def register(self, tags, usn=None) -> None:
+    def register(self, tags: Collection[str], usn: Optional[int] = None) -> None:
         "Given a list of tags, add any missing ones to tag registry."
         found = False
         for t in tags:
@@ -55,7 +55,7 @@ class TagManager:
     def all(self) -> List:
         return list(self.tags.keys())
 
-    def registerNotes(self, nids=None) -> None:
+    def registerNotes(self, nids: Optional[List[int]] = None) -> None:
         "Add any missing tags from notes to the tags list."
         # when called without an argument, the old list is cleared first.
         if nids:
@@ -94,7 +94,7 @@ class TagManager:
     # Bulk addition/removal from notes
     #############################################################
 
-    def bulkAdd(self, ids, tags, add=True) -> None:
+    def bulkAdd(self, ids: List[int], tags: str, add: bool = True) -> None:
         "Add tags in bulk. TAGS is space-separated."
         newTags = self.split(tags)
         if not newTags:
@@ -137,23 +137,23 @@ class TagManager:
             [fix(row) for row in res],
         )
 
-    def bulkRem(self, ids, tags) -> None:
+    def bulkRem(self, ids: List[int], tags: str) -> None:
         self.bulkAdd(ids, tags, False)
 
     # String-based utilities
     ##########################################################################
 
-    def split(self, tags) -> List[str]:
+    def split(self, tags: str) -> List[str]:
         "Parse a string and return a list of tags."
         return [t for t in tags.replace("\u3000", " ").split(" ") if t]
 
-    def join(self, tags) -> str:
+    def join(self, tags: List[str]) -> str:
         "Join tags into a single string, with leading and trailing spaces."
         if not tags:
             return ""
         return " %s " % " ".join(tags)
 
-    def addToStr(self, addtags, tags) -> str:
+    def addToStr(self, addtags: str, tags: str) -> str:
         "Add tags if they don't exist, and canonify."
         currentTags = self.split(tags)
         for tag in self.split(addtags):
@@ -161,7 +161,7 @@ class TagManager:
                 currentTags.append(tag)
         return self.join(self.canonify(currentTags))
 
-    def remFromStr(self, deltags, tags) -> str:
+    def remFromStr(self, deltags: str, tags: str) -> str:
         "Delete tags if they exist."
 
         def wildcard(pat, str):
@@ -183,7 +183,7 @@ class TagManager:
     # List-based utilities
     ##########################################################################
 
-    def canonify(self, tagList) -> List[str]:
+    def canonify(self, tagList: List[str]) -> List[str]:
         "Strip duplicates, adjust case to match existing tags, and sort."
         strippedTags = []
         for t in tagList:
@@ -194,7 +194,7 @@ class TagManager:
             strippedTags.append(s)
         return sorted(set(strippedTags))
 
-    def inList(self, tag, tags) -> bool:
+    def inList(self, tag: str, tags: List[str]) -> bool:
         "True if TAG is in TAGS. Ignore case."
         return tag.lower() in [t.lower() for t in tags]