Goods and Services Tax (GST) collections are likely to remain robust at about ₹1.15 lakh crore to ₹1.2 lakh crore in April, despite the spate of lockdowns across the country, SBI said in a report on Friday, ahead of the official GST revenue data expected on May 1.GST collections have clocked more than ₹1 lakh crore for six months in a row, with a record ₹1.24 lakh crore flowing into the exchequer’s coffers in March.Last year, at the peak of the lockdown in April and May 2020, only 0.9 crore and 2.5 crore e-way bills were generated, respectively. In March this year, when GST collections peaked at ₹1.24 lakh crore, 7.1 crore e-way bills were generated.