Farewell Tawaf And Second Umrah
There is no compulsion, you can perform last tawaf this time or before your departure flight. In the spirit of the directive, it seems better if it is done as last thing before returning home i.e. before departure flight. ( Please see : Discussion 85158 ). And no, it is not obligatory to perform umrah after re-entering haram bounday or meeqat. Instead, if one has already performed one Umrah with their Hajj ( Hajj-i-Tamatto ), then performing further Umrah is a Biddah ( Please see : Discussion 84263 ).
Thanks a lot for explaining clearing about my doubt. Jazakallah Khair.