Adding a tab subscreen in VA01/VA02/VA03

Hello guys,

I searched for screen exits in VA package using SMOD. But i am unable to understand how to do it. I want to add a tab in line item tabs, in which i want to add new custom fields. Is there any screen exit for screen number 4003 where i can add one more tab and custom fields in that tab. Thanking you,

Regards,

Yayati EKbote