@michoel @mtsb I have the "new ITU" button working (opens in create mode) but the default parameter I'm passing isn't filling in automatically. Not sure why. URL: https://695173.app.netsuite.com/app/common/custom/custrecordentry.nl?rectype=306&custrecord_itu_itt=23 I've checked that I've got the right ID for the field. I also tried using this to set other fields and it doesn't seem to work for any of them.