Tax at the time of final payment of chitfund amt

Is TDS or GST is applicable at the time of final payment of chitfund amount on completion of term.


For example chit fund amt is 5lakhs for five years. Every month approx 8000 is installment amount.
For our amount interest will be earned and that interest will be deducted from next month installment means for first month installment interest earned Rs.50 (for example) next month installment will be 7950/-

My query is in this case at the time of final payment means at the end of fifth year they will pay 5lakhs. On that amount any TDS or GST is applicable?????