Have not deposited TDS on under construction property

I booked an under-construction flat in February 2022. Total cost of flat including GST is 1.14 Cr. I paid the 10L in February 2022, 10L in March 2022 and 12L in May 2022. I paid 40L in September 2023. I was not aware of TDS law and did not deposit/deduct any TDS so far. 

Please guide me on the next steps on this. 

Should I submit a challan for each instalment or one consolidated challan ? Will there be penalties involved ?

I spoke to builder and he said TDS 1% would be shown during last installment.