Exemtion query

No, IDT Exemption cannot be claimed. Reason you got exemption in ISCA group 2 in may 2018 so even if you get exemption in any subject of group 2 during nov 2018, may 2019, nov 2019 you cannot claim exemption. For detailed clarification you go to icai.org and go to FAQS relating to examination. You can check the marksheet there won't be exemption given to the idt.