Hi  @Nidhin

K2 has a timer control that auto refresh the form every X seconds

Please check the the link:
https://help.k2.com/onlinehelp/k2smartforms/userguide/4.7/default.htm#Timer_control.htm

Hope it helps

Regards
Thabiso Ngobese

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Hi Tabiso, 

Thanks for the valuable suggestion.

I have tried Timer control but it didnt serve the exact purpose. I suggested the same but client want instant refresh on subform close. 

Good day,

You can create a rule that fire's when the subform closes,  you set the rule that when On subform close, start refresh the main  form.

Kind regards

Hi Nidhin,

You can use event When subview is closing its available under Subview Events 
then Add action execute the List refresh method

This will help to do a list refresh in parent form when a subform is closed.