India, Aug. 28 -- New Delhi The total fraud under the Goods and Services Tax (GST) may have already crossed the Rs 1 lakh crore-mark because it was launched "without full legal and administrative preparedness", and the Rs 45,682 crore evasion detected by the Centre is understated, West Bengal's finance minister Amit Mitra wrote in a letter to Union finance minister Nirmala Sitharaman....