How Can I Update Task Reminder Date in Custom Function

How Can I Update Task Reminder Date in Custom Function

Hello everyone,

I wrote a function for to update task reminder date but I got issue.  How should I fix. Should I add which  parameters? Do you have any idea?

updateRemind_At = zoho.crm.updateRecord("Tasks",taskid,{"Remind_At":now.toString("yyyy-MM-dd","Turkey")});


This code is working successfully.
updateDueDate = zoho.crm.updateRecord("Tasks",taskid,{"Due_Date":now.toString("yyyy-MM-dd","Turkey")});