How to add/remove tag to a ticket with function?

How to add/remove tag to a ticket with function?

Hi, 
I have had to create a function in Zoho Desk. However, it appears that the syntax differs from that in CRM.
I realized that it is necessary to add organization ID in some commands what is not necessary when you create a funciotn in CRM.

Could you help me with adding and removing tags? Here is the code:
  2. ticketData = zoho.desk.getRecordById(orgID,"Tickets",Ticket_Id);
  3. // Can I get the realted Contact with the following command?
  4. contactData = zoho.desk.getRecordById(orgID,"Contacts",contactId);

  6. if(contactData.get("TRIAL") != null)
  7. {
  8.  trialDate = contactData.get("TRIAL");
  9.  if(trialDate.toDate() >= zoho.currentdate)
  10. {
  11.         ticketTags = ticketData.get("Tags");
  12. ticketTags.add("TRIAL");
  13. ticketData.put("Tags",ticketTags);
  14. zoho.desk.update(orgID,"Tickets", ticketData.get("id"), ticketdata);

  16. }

  18. }