Google Apps Script code to add Google Form edit response links to spreadsheet

Apps Script Code - Copy the edit response link from Google Forms entries into a Google Sheet

function assignEditUrls() {
  var form = FormApp.openById('yourFormKey');
    //enter form ID here

  var sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName('yourWorksheetName');

    //Change the sheet name as appropriate
  var data = sheet.getDataRange().getValues();
  var urlCol = ; // column number where URL's should be populated; A = 1, B = 2 etc
  var responses = form.getResponses();
  var timestamps = [], urls = [], resultUrls = [];
  
  for (var i = 0; i < responses.length; i++) {
    timestamps.push(responses[i].getTimestamp().setMilliseconds(0));
    urls.push(responses[i].getEditResponseUrl());
  }
  for (var j = 1; j < data.length; j++) {

    resultUrls.push([data[j][0]?urls[timestamps.indexOf(data[j][0].setMilliseconds(0))]:'']);
  }
  sheet.getRange(2, urlCol, resultUrls.length).setValues(resultUrls);  
}

How to use it

Copy the code above.
Paste it in the Google Sheet where you want to collect the edit response links.
Change the following parameters:
  line 2 - Google Form ID number;
  line 5 - Destination Worksheet name;
  line 9 - Column number where edit response links should be collected;
Save and run script.
Check that edit response links are collected in the right column in your destination Sheet