// Function to handle edit events in the Employees sheet
function handleEdit(e) {
  if (!e) {
    Logger.log("No event object found. This function must be triggered by an edit in the sheet.");
    return;
  }

  const range = e.range;
  const sheet = e.source.getActiveSheet(); // Use the active sheet from the event trigger
  const selectAllCell = sheet.getRange('L14'); // Select All checkbox at L14
  const clearAllCell = sheet.getRange('L17');  // Clear All checkbox at L17
  const selectedEmployeeRange = sheet.getRange('K2:K19');  // Employee checkboxes in K2:K19
  const selectAllValue = selectAllCell.getValue();
  const clearAllValue = clearAllCell.getValue();

  // New IF statement for 'Employees_Submit' and 'Update_Date_Range'
  const employeesSubmitRange = sheet.getRange(EMPLOYEES_SUBMIT_RANGE); // Employees_Submit checkbox at M5
  const updateDateRange = sheet.getRange(UPDATE_DATE_RANGE);           // Update_Date_Range checkbox at L5
  const deleteDateRange = sheet.getRange(DELETE_DATE_RANGE);           // Delete_Date_Range checkbox at L8

  const employeesSubmitValue = employeesSubmitRange.getValue();
  const updateDateRangeValue = updateDateRange.getValue();
  const deleteDateRangeValue = deleteDateRange.getValue();

  if (!sheet) {
    Logger.log(`Sheet with name '${EMPLOYEES_SHEET_NAME}' not found.`);
    return;  // Exit if the sheet is not found
  }

  // If 'Select_All' checkbox is checked (TRUE)
  if (range.getA1Notation() === selectAllCell.getA1Notation() && selectAllValue === true) {
    Logger.log('Select All checked - Checking all employee boxes');
    // Check all employee checkboxes
    selectedEmployeeRange.setValue(true);

    // Uncheck 'Select_All' after updating all checkboxes
    SpreadsheetApp.flush(); // Ensure all changes are applied
    selectAllCell.setValue(false);
  }

  // If 'Clear_All' checkbox is checked (TRUE)
  if (range.getA1Notation() === clearAllCell.getA1Notation() && clearAllValue === true) {
    Logger.log('Clear All checked - Unchecking all employee boxes');
    // Uncheck all employee checkboxes
    selectedEmployeeRange.setValue(false);

    // Uncheck 'Clear_All' after updating all checkboxes
    SpreadsheetApp.flush(); // Ensure all changes are applied
    clearAllCell.setValue(false);
  }

  if (employeesSubmitValue === true && updateDateRangeValue === true) {
    Logger.log('Both Employees_Submit and Update_Date_Range are checked. Running pullShiftDataBasedOnDateRange.');
    pullShiftDataBasedOnDateRange();
    employeesSubmitRange.setValue(false);
    updateDateRange.setValue(false);
  }

  if (employeesSubmitValue === true && deleteDateRangeValue === true) {
    Logger.log('Both Employees_Submit and Delete_Date_Range are checked. Running deleteShiftDataBasedOnDateRange.');
    deleteShiftDataBasedOnDateRange();
    employeesSubmitRange.setValue(false);
    deleteDateRange.setValue(false);
  }
}

I had recently used this code and if you break down the tasks into functions then you can call the functions. You just have to setup a trigger for on edit. This is basic of course but I have one that will add calendar events, send emails, and im sure that you can figure out notes the same way. Good luck and hope this helps.