(1) my mother,myself and my wife have a site with an extent of 419 sq.yds. and went into joint development agreement with builder on FEB 2018 and in consideration we are promised 2 flats for my mother( 1 residential and 1 non-residential),1 residential flat for me and 1 residential flat for my wife.1 flat including common areas is 1000sq.ft and 1 sq.ft. government stamp duty value is 2200rupees and for non-residential flat is 2500rupees.Builder sold all flats by December 2018.We are GST unregistered during Joint development agreement and even now we are not having GST registration.Builder handed over the flats in DEC2019 after OCCUPANCY CERTIFICATE.Could you let me know do we need to pay GST on 4 flats or not and HOW MUCH AND WHEN TO PAY.Builder has not asked us GST. Could you tell me the GST liability is with landlord or builder since our agreement is done before 01/04/2019.
Also clarify since I am GST unregistered and builder is GST registered does he need to pay GST under reverse charge mechanism as our JDA took place before 01/04/2019 I.e. on FEB 2018
Right now builder is not asking GST but also tell me the liability is with landlord or builder
(2) Also my salary,interest incomes from partnership firm,residental rents income and commercial rent income altogether crosses 20lakhs so whether i need to pay GST or not,if so do i need to pay on entire income or only towards commercial rent income.As i heard that agrregate turnover mean exempted supplies too.And whether i need to take GST registration or not