35% GST challan generation help

I opted for QRMP scheme in GST, while generating 35% auto challan, Challan is generated 35% of last month payment, whereas it should generate challan for full amount paid in last month of Quarter. I tried all options available, please guide me generate correct challan.

shown by example:

GST paid in Oct-20 Rs. 75000

GST paid in Nov-20 Rs. 80000

GST paid in Dec-20 Rs. 85000

Total paid in Q3 - 240000

35% challan gnerated is 35% of 85000 = 29750.

Whereas as per rules GST side should generate a challan for Rs.85000 (ie last month payment)

Regards

Manoj Punjabi