diff --git a/src/main/decoder/decode-ttl.interface.ts b/src/main/decoder/decode-ttl.interface.ts
index 67e2c8b..52662d8 100644
--- a/src/main/decoder/decode-ttl.interface.ts
+++ b/src/main/decoder/decode-ttl.interface.ts
@@ -1,7 +1,7 @@
 export interface DecodedTtl {
   clm_total: number;
   depreciation_taxes: number;
-  cieca_ttl: DecodedTtlLine;
+  cieca_ttl: { data: DecodedTtlLine };
 }
 
 export interface DecodedTtlLine {
diff --git a/src/main/decoder/decode-ttl.ts b/src/main/decoder/decode-ttl.ts
index 02b729d..2bd10ec 100644
--- a/src/main/decoder/decode-ttl.ts
+++ b/src/main/decoder/decode-ttl.ts
@@ -47,6 +47,10 @@ const DecodeTtl = async (
 
   //Apply business logic transfomrations.
 
-  return { clm_total: 0, depreciation_taxes: 0, cieca_ttl: rawTtlData };
+  return {
+    clm_total: 0,
+    depreciation_taxes: 0,
+    cieca_ttl: { data: rawTtlData },
+  };
 };
 export default DecodeTtl;
diff --git a/src/main/decoder/decoder.ts b/src/main/decoder/decoder.ts
index 8a73220..b9e8f45 100644
--- a/src/main/decoder/decoder.ts
+++ b/src/main/decoder/decoder.ts
@@ -45,7 +45,8 @@ async function ImportJob(filepath: string): Promise<void> {
     const pfm: DecodedPfm = await DecodePfm(extensionlessFilePath);
     const pfo: DecodedPfo = await DecodePfo(extensionlessFilePath); // TODO: This will be the `cieca_pfo` object
     const stl: DecodedStl[] = await DecodeStl(extensionlessFilePath); // TODO: This will be the `cieca_stl` object
-    const ttl: DecodedTtl = await DecodeTtl(extensionlessFilePath); //
+    const ttl: DecodedTtl = await DecodeTtl(extensionlessFilePath);
+
     log.debug("EMS Object", {
       ad1,
       ad2,
diff --git a/src/main/ipc/ipcMainConfig.ts b/src/main/ipc/ipcMainConfig.ts
index 0eaff7c..df91576 100644
--- a/src/main/ipc/ipcMainConfig.ts
+++ b/src/main/ipc/ipcMainConfig.ts
@@ -37,8 +37,8 @@ const logIpcMessages = (): void => {
   });
 };
 
-ipcMain.on(ipcTypes.toMain.test, (payload: any) =>
-  console.log("** Verify that ipcMain is loaded and working.", payload)
+ipcMain.on(ipcTypes.toMain.test, () =>
+  console.log("** Verify that ipcMain is loaded and working.")
 );
 
 //Auth handler
@@ -48,18 +48,15 @@ ipcMain.on(ipcTypes.toMain.authStateChanged, ipcMainHandleAuthStateChanged);
 if (import.meta.env.DEV) {
   log.debug("[IPC Debug Functions] Adding Debug Handlers");
 
-  ipcMain.on(
-    ipcTypes.toMain.debug.decodeEstimate,
-    async (event, payload): Promise<void> => {
-      const relativeEmsFilepath = `_reference/ems/MPI_1/3698420.ENV`;
-      // Get the app's root directory and create an absolute path
-      const rootDir = app.getAppPath();
-      const absoluteFilepath = path.join(rootDir, relativeEmsFilepath);
+  ipcMain.on(ipcTypes.toMain.debug.decodeEstimate, async (): Promise<void> => {
+    const relativeEmsFilepath = `_reference/ems/MPI_1/3698420.ENV`;
+    // Get the app's root directory and create an absolute path
+    const rootDir = app.getAppPath();
+    const absoluteFilepath = path.join(rootDir, relativeEmsFilepath);
 
-      log.debug("[IPC Debug Function] Decode test Estimate", absoluteFilepath);
-      await ImportJob(absoluteFilepath);
-    }
-  );
+    log.debug("[IPC Debug Function] Decode test Estimate", absoluteFilepath);
+    await ImportJob(absoluteFilepath);
+  });
 }
 
 //Settings Handlers
diff --git a/src/main/ipc/ipcMainHandler.settings.ts b/src/main/ipc/ipcMainHandler.settings.ts
index 8e8c5e2..690ea76 100644
--- a/src/main/ipc/ipcMainHandler.settings.ts
+++ b/src/main/ipc/ipcMainHandler.settings.ts
@@ -3,11 +3,11 @@ import log from "electron-log/main";
 import _ from "lodash";
 import Store from "../store/store";
 
-const SettingsWatchedFilePathsAdd = async (event: IpcMainInvokeEvent) => {
+const SettingsWatchedFilePathsAdd = async (): Promise<string[]> => {
   const mainWindow = BrowserWindow.getAllWindows()[0]; //TODO: Filter to only main window once a proper key has been set.
   if (!mainWindow) {
     log.error("No main window found when trying to open dialog");
-    return;
+    return [];
   }
   const result = await dialog.showOpenDialog(mainWindow, {
     properties: ["openDirectory"],
@@ -25,7 +25,7 @@ const SettingsWatchedFilePathsAdd = async (event: IpcMainInvokeEvent) => {
 const SettingsWatchedFilePathsRemove = async (
   event: IpcMainInvokeEvent,
   path: string
-) => {
+): Promise<string[]> => {
   Store.set(
     "settings.filepaths",
     _.without(Store.get("settings.filepaths"), path)
@@ -34,8 +34,8 @@ const SettingsWatchedFilePathsRemove = async (
   return Store.get("settings.filepaths");
 };
 
-const SettingsWatchedFilePathsGet = async (event: IpcMainInvokeEvent) => {
-  const filepaths = Store.get("settings.filepaths");
+const SettingsWatchedFilePathsGet = async (): Promise<string[]> => {
+  const filepaths: string[] = Store.get("settings.filepaths") || [];
   return filepaths;
 };
 
diff --git a/src/main/ipc/ipcMainHandler.user.ts b/src/main/ipc/ipcMainHandler.user.ts
index a593283..1899009 100644
--- a/src/main/ipc/ipcMainHandler.user.ts
+++ b/src/main/ipc/ipcMainHandler.user.ts
@@ -5,7 +5,7 @@ import Store from "../store/store";
 const ipcMainHandleAuthStateChanged = async (
   event: IpcMainEvent,
   user: User | null
-) => {
+): Promise<void> => {
   Store.set("user", user);
 };
 
diff --git a/src/main/watcher/watcher.ts b/src/main/watcher/watcher.ts
index eb8f0ee..3237133 100644
--- a/src/main/watcher/watcher.ts
+++ b/src/main/watcher/watcher.ts
@@ -9,8 +9,8 @@ import ImportJob from "../decoder/decoder";
 let watcher: FSWatcher;
 
 async function StartWatcher(): Promise<boolean> {
-  const filePaths = store.get("settings.filepaths") || [];
-  log.info("Use polling? ", store.get("settings.polling").enabled);
+  const filePaths: string[] = store.get("settings.filepaths") || [];
+
   if (filePaths.length === 0) {
     new Notification({
       //TODO: Add Translations
diff --git a/src/renderer/src/components/ErrorBoundaryFallback/ErrorBoundaryFallback.tsx b/src/renderer/src/components/ErrorBoundaryFallback/ErrorBoundaryFallback.tsx
index e347cb0..7a42570 100644
--- a/src/renderer/src/components/ErrorBoundaryFallback/ErrorBoundaryFallback.tsx
+++ b/src/renderer/src/components/ErrorBoundaryFallback/ErrorBoundaryFallback.tsx
@@ -12,7 +12,11 @@ const ErrorBoundaryFallback: React.FC<FallbackProps> = ({
       status={"500"}
       title={t("app.errors.errorboundary")}
       subTitle={error?.message}
-      extra={[<Button onClick={resetErrorBoundary}>Try again</Button>]}
+      extra={[
+        <Button key="try-again" onClick={resetErrorBoundary}>
+          Try again
+        </Button>,
+      ]}
     />
   );
 };
diff --git a/src/renderer/src/components/Settings/Settings.Watcher.tsx b/src/renderer/src/components/Settings/Settings.Watcher.tsx
index 5828233..1ee62de 100644
--- a/src/renderer/src/components/Settings/Settings.Watcher.tsx
+++ b/src/renderer/src/components/Settings/Settings.Watcher.tsx
@@ -5,7 +5,7 @@ import ipcTypes from "../../../../util/ipcTypes.json";
 const SettingsWatcher: React.FC = () => {
   const { t } = useTranslation();
 
-  const handleStart = () => {
+  const handleStart = (): void => {
     window.electron.ipcRenderer.send(ipcTypes.toMain.watcher.start);
   };
 
diff --git a/src/renderer/src/components/SignInForm/SignInForm.tsx b/src/renderer/src/components/SignInForm/SignInForm.tsx
index bf27878..0e8cc06 100644
--- a/src/renderer/src/components/SignInForm/SignInForm.tsx
+++ b/src/renderer/src/components/SignInForm/SignInForm.tsx
@@ -5,15 +5,13 @@ import log from "electron-log/renderer";
 import { signInWithEmailAndPassword } from "firebase/auth";
 import errorTypeCheck from "../../../../util/errorTypeCheck";
 
-type SignInFormProps = {};
-
 type FieldType = {
   username: string;
   password: string;
   remember?: string;
 };
 
-const SignInForm: React.FC<SignInFormProps> = ({}) => {
+const SignInForm: React.FC = () => {
   const onFinish: FormProps<FieldType>["onFinish"] = async (values) => {
     log.info("Form submitted successfully:", values);
     const { username, password } = values;
diff --git a/src/renderer/src/util/firebase.ts b/src/renderer/src/util/firebase.ts
index 10f885c..b506ba9 100644
--- a/src/renderer/src/util/firebase.ts
+++ b/src/renderer/src/util/firebase.ts
@@ -1,5 +1,5 @@
 import { initializeApp } from "firebase/app";
-import { getAuth, updatePassword, updateProfile } from "firebase/auth";
+import { getAuth } from "firebase/auth";
 
 // TODO: Replace the following with your app's Firebase project configuration
 const firebaseConfig = JSON.parse(import.meta.env.VITE_FIREBASE_CONFIG);
diff --git a/src/util/deepLowercaseKeys.ts b/src/util/deepLowercaseKeys.ts
index 9847d6e..ddfc375 100644
--- a/src/util/deepLowercaseKeys.ts
+++ b/src/util/deepLowercaseKeys.ts
@@ -1,3 +1,5 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+
 /**
  * Deep renames all keys in an object to lowercase
  * @param obj - The object to transform