so, you've created some code for me that works pretty well.  here is the code.gs, and an html script for categorization.  I noticed however that the categories don't show up.  Here are the scripts:  code.gs: // Define the list of categories
const CATEGORIES = [
  "Revenue",
  "Donations",
  "House",
  "Food",
  "Auto",
  "Debts",
  "E&R",
  "Clothes",
  "Investments",
  "Health care",
  "Life & disability Insurance",
  "Misc"
];

/**
 * Main function to initiate the categorization process.
 */
function importAndCategorizeTransactions() {
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var transactionsSheet = ss.getSheetByName("Transactions");
  var expensesSheet = ss.getSheetByName("Expenses");
  
  // Validate Sheet Existence
  if (!transactionsSheet) {
    SpreadsheetApp.getUi().alert("The 'Transactions' sheet does not exist.");
    return;
  }
  
  if (!expensesSheet) {
    SpreadsheetApp.getUi().alert("The 'Expenses' sheet does not exist.");
    return;
  }

  // Define Constants
  var TRANSACTION_START_ROW = 2; // Transactions start at Row 2
  var EXPENSES_START_ROW = 6;    // Expenses data starts at Row 6
  var PROCESSED_COLUMN = 4;      // Column D (1-based index)

  // Check if 'Processed' header exists; if not, add it
  var processedHeader = transactionsSheet.getRange(1, PROCESSED_COLUMN).getValue(); // Row 1, Column D
  if (processedHeader.toString().trim().toUpperCase() !== "PROCESSED") {
    transactionsSheet.getRange(1, PROCESSED_COLUMN).setValue("Processed");
  }

  // Fetch Transactions Data (Columns A-C and D)
  var lastTransactionRow = transactionsSheet.getLastRow();
  if (lastTransactionRow < TRANSACTION_START_ROW) {
    SpreadsheetApp.getUi().alert("No transactions found to process.");
    return;
  }
  
  // Fetch data from Columns A-C and D (Processed)
  var transactionDataRange = transactionsSheet.getRange(TRANSACTION_START_ROW, 1, lastTransactionRow - TRANSACTION_START_ROW + 1, PROCESSED_COLUMN);
  var transactionsData = transactionDataRange.getValues();
  
  // Fetch Expenses Category Headers (Row 4, Columns E onwards)
  var expensesHeaderRange = expensesSheet.getRange(4, 5, 1, expensesSheet.getLastColumn() - 4); // Row 4, Columns E onwards
  var expensesHeaders = expensesHeaderRange.getValues()[0]; // First (and only) row
  
  // Create Category to Column Mapping with Original Names
  var categoryMap = {};
  for (var c = 0; c < expensesHeaders.length; c++) {
    var categoryOriginal = expensesHeaders[c].toString().trim();
    var categoryKey = categoryOriginal.toUpperCase();
    if (categoryOriginal !== "") {
      categoryMap[categoryKey] = { column: c + 5, name: categoryOriginal };
    }
  }
  
  // Store Necessary Data in Script Properties for Access in HTML Dialog
  var props = PropertiesService.getScriptProperties();
  props.setProperty("TRANSACTION_START_ROW", TRANSACTION_START_ROW);
  props.setProperty("PROCESSED_COLUMN", PROCESSED_COLUMN);
  props.setProperty("EXPENSES_START_ROW", EXPENSES_START_ROW);
  
  // Store all transactions data in properties as JSON
  props.setProperty("TRANSACTIONS_DATA", JSON.stringify({
    transactions: transactionsData,
    lastRow: lastTransactionRow
  }));
  
  // Store categoryMap in properties as JSON
  props.setProperty("CATEGORY_MAP", JSON.stringify(categoryMap));
  
  // Store ExpensesSheet name to access it later
  props.setProperty("EXPENSES_SHEET_NAME", expensesSheet.getName());
  
  // Open the categorization dialog
  showCategorizationDialog();
}

/**
 * Function to display the custom categorization dialog.
 */
function showCategorizationDialog() {
  var html = HtmlService.createHtmlOutputFromFile('CategoryPrompt')
    .setWidth(400)
    .setHeight(300);
  SpreadsheetApp.getUi().showModalDialog(html, 'Categorize Transactions');
}

/**
 * Function to process the selected category and proceed to the next transaction.
 * Triggered by the HTML dialog upon user selection.
 */
function processCategory(categorySelected) {
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var transactionsSheet = ss.getSheetByName("Transactions");
  var expensesSheetName = PropertiesService.getScriptProperties().getProperty("EXPENSES_SHEET_NAME");
  var expensesSheet = ss.getSheetByName(expensesSheetName);
  
  var TRANSACTION_START_ROW = parseInt(PropertiesService.getScriptProperties().getProperty("TRANSACTION_START_ROW"), 10);
  var PROCESSED_COLUMN = parseInt(PropertiesService.getScriptProperties().getProperty("PROCESSED_COLUMN"), 10);
  var EXPENSES_START_ROW = parseInt(PropertiesService.getScriptProperties().getProperty("EXPENSES_START_ROW"), 10);
  
  var transactionsData = JSON.parse(PropertiesService.getScriptProperties().getProperty("TRANSACTIONS_DATA"));
  var categoryMap = JSON.parse(PropertiesService.getScriptProperties().getProperty("CATEGORY_MAP"));
  
  // Find the next unprocessed transaction
  var transactionIndex = -1;
  for (var i = 0; i < transactionsData.transactions.length; i++) {
    var processed = transactionsData.transactions[i][PROCESSED_COLUMN - 1];
    if (!processed || processed.toString().trim() === "") {
      transactionIndex = i;
      break;
    }
  }
  
  if (transactionIndex === -1) {
    // All transactions processed
    SpreadsheetApp.getUi().alert("All transactions have been processed and categorized successfully.");
    // Cleanup Script Properties
    PropertiesService.getScriptProperties().deleteAllProperties();
    return;
  }
  
  var row = transactionsData.transactions[transactionIndex];
  
  // Extract Transaction Details
  var transactionDateRaw = row[0]; // Column A
  var transactionDesc = row[1];     // Column B
  var transactionAmount = row[2];   // Column C
  
  // Parse Date to Extract Day
  var transactionDay = extractDay(transactionDateRaw);
  
  if (transactionDay === null) {
    SpreadsheetApp.getUi().alert("Unable to parse date in 'Transactions' sheet at row " + (TRANSACTION_START_ROW + transactionIndex) + ". Skipping this transaction.");
    // Mark as processed with "Error" to avoid repeated alerts
    transactionsSheet.getRange(TRANSACTION_START_ROW + transactionIndex, PROCESSED_COLUMN).setValue("Error");
    // Proceed to the next transaction
    showCategorizationDialog();
    return;
  }
  
  // Validate Day
  if (transactionDay < 1 || transactionDay > 31) {
    SpreadsheetApp.getUi().alert("Invalid day (" + transactionDay + ") extracted from date in 'Transactions' sheet at row " + (TRANSACTION_START_ROW + transactionIndex) + ". Skipping this transaction.");
    // Mark as processed with "Error" to avoid repeated alerts
    transactionsSheet.getRange(TRANSACTION_START_ROW + transactionIndex, PROCESSED_COLUMN).setValue("Error");
    // Proceed to the next transaction
    showCategorizationDialog();
    return;
  }
  
  // Validate Selected Category
  var categoryKey = categorySelected.toUpperCase();
  if (!categoryMap.hasOwnProperty(categoryKey)) {
    SpreadsheetApp.getUi().alert("Selected category '" + categorySelected + "' is invalid. Please try again.");
    // Re-open the dialog for the same transaction
    showCategorizationDialog();
    return;
  }
  
  var categoryData = categoryMap[categoryKey];
  var categoryColumn = categoryData.column;
  var categoryName = categoryData.name;
  
  // Locate Row in Expenses Sheet Based on Day
  var expensesLastRow = expensesSheet.getLastRow();
  var dayRow = -1;
  
  // Assuming Dates (1-31) are in Column A starting from Row 6
  var dateColumnRange = expensesSheet.getRange(EXPENSES_START_ROW, 1, expensesLastRow - EXPENSES_START_ROW + 1, 1);
  var dateValues = dateColumnRange.getValues();
  
  for (var r = 0; r < dateValues.length; r++) {
    var cellDay = dateValues[r][0];
    if (cellDay === transactionDay) {
      dayRow = EXPENSES_START_ROW + r;
      break;
    }
  }
  
  if (dayRow === -1) {
    SpreadsheetApp.getUi().alert("No matching day (" + transactionDay + ") found in 'Expenses' sheet for transaction at row " + (TRANSACTION_START_ROW + transactionIndex) + ". Skipping this transaction.");
    // Mark as processed with "Error" to skip this transaction
    transactionsSheet.getRange(TRANSACTION_START_ROW + transactionIndex, PROCESSED_COLUMN).setValue("Error");
    // Proceed to the next transaction
    showCategorizationDialog();
    return;
  }
  
  // Prepare Transaction Entry (Only Amount)
  var transactionAmountValue = parseFloat(transactionAmount).toFixed(2); // e.g., "150.00" or "-75.50"
  var numericAmount = parseFloat(transactionAmountValue); // Convert to number: 150.00 or -75.50
  
  // Fetch Existing Cell Value in Expenses Sheet
  var targetCell = expensesSheet.getRange(dayRow, categoryColumn);
  var existingValue = targetCell.getValue();
  
  var newTotal = numericAmount;
  
  if (typeof existingValue === 'number') {
    newTotal = existingValue + numericAmount;
  } else if (typeof existingValue === 'string') {
    // Attempt to parse all amounts if stored as text entries
    // Example: "$50.00\n$25.00"
    var amountLines = existingValue.split('\n');
    var sumExisting = 0;
    for (var j = 0; j < amountLines.length; j++) {
      // Extract numerical value from each line
      var amt = parseFloat(amountLines[j].replace(/[^-\d\.]/g, ''));
      if (!isNaN(amt)) {
        sumExisting += amt;
      }
    }
    newTotal = sumExisting + numericAmount;
  }
  // Else (empty or other types), newTotal remains as numericAmount
  
  // Round to two decimal places to avoid floating point issues
  newTotal = Math.round((newTotal + Number.EPSILON) * 100) / 100;
  
  // Set the new total back to the Expenses sheet
  // Assumes the cell is formatted as Currency or Number
  targetCell.setValue(newTotal);
  targetCell.setNumberFormat("$#,##0.00"); // Optional: Ensures currency format
  
  // Mark Transaction as Processed with Category Name
  transactionsSheet.getRange(TRANSACTION_START_ROW + transactionIndex, PROCESSED_COLUMN).setValue(categoryName);
  
  // Proceed to the next transaction
  showCategorizationDialog();
}

/**
 * Extracts the day from a date input, ignoring the month.
 * @param {string|Date} dateInput - The date input which can be a Date object or a string.
 * @return {number|null} - Returns the day as a number (1-31) or null if parsing fails.
 */
function extractDay(dateInput) {
  if (dateInput instanceof Date) {
    return dateInput.getDate();
  } else if (typeof dateInput === 'string') {
    // Attempt to parse the day from the string
    // Assuming formats like "Dec-01", "2023-12-01", "12/01/2023", etc.
    var parsedDate = new Date(dateInput);
    if (!isNaN(parsedDate)) {
      return parsedDate.getDate();
    } else {
      // If parsing fails, attempt to extract the day manually
      var dayMatch = dateInput.match(/(\d{1,2})$/);
      if (dayMatch && dayMatch[1]) {
        var day = parseInt(dayMatch[1], 10);
        if (!isNaN(day) && day >= 1 && day <= 31) {
          return day;
        }
      }
    }
  }
  return null; // Failed to parse day
}

/**
 * Formats the date input into a readable string.
 * @param {string|Date} dateInput - The date input which can be a Date object or a string.
 * @return {string} - Returns the formatted date string.
 */
function formatDate(dateInput) {
  if (dateInput instanceof Date) {
    return Utilities.formatDate(dateInput, Session.getScriptTimeZone(), "EEE MMM dd yyyy");
  } else if (typeof dateInput === 'string') {
    var parsedDate = new Date(dateInput);
    if (!isNaN(parsedDate)) {
      return Utilities.formatDate(parsedDate, Session.getScriptTimeZone(), "EEE MMM dd yyyy");
    } else {
      return dateInput; // Return as-is if unable to parse
    }
  }
  return "";
}

/**
 * Function to handle the callback from the HTML dialog.
 * It receives the selected category and processes the transaction.
 * @param {string} categorySelected - The category selected by the user.
 */
function handleCategorySelection(categorySelected) {
  processCategory(categorySelected);
}

/**
 * Retrieves the current transaction details to display in the HTML dialog.
 * @return {Object} - An object containing date, description, and amount.
 */
function getCurrentTransactionDetails() {
  var props = PropertiesService.getScriptProperties();
  var transactionsData = JSON.parse(props.getProperty("TRANSACTIONS_DATA"));
  var TRANSACTION_START_ROW = parseInt(props.getProperty("TRANSACTION_START_ROW"), 10);
  var PROCESSED_COLUMN = parseInt(props.getProperty("PROCESSED_COLUMN"), 10);
  
  // Find the first unprocessed transaction
  for (var i = 0; i < transactionsData.transactions.length; i++) {
    var row = transactionsData.transactions[i];
    var processed = row[PROCESSED_COLUMN - 1];
    if (!processed || processed.toString().trim() === "") {
      var transactionDateRaw = row[0]; // Column A
      var transactionDesc = row[1];     // Column B
      var transactionAmount = row[2];   // Column C
      
      // Format the date
      var formattedDate = formatDate(transactionDateRaw);
      
      return {
        date: formattedDate,
        description: transactionDesc,
        amount: parseFloat(transactionAmount).toFixed(2)
      };
    }
  }
  
  // If no unprocessed transactions are found
  return {};
}

/**
 * Adds a custom menu to the Google Sheets UI upon opening the spreadsheet.
 */
function onOpen() {
  var ui = SpreadsheetApp.getUi();
  ui.createMenu('Transaction Tools')
    .addItem('Import & Categorize Transactions', 'importAndCategorizeTransactions')
    .addToUi();
}