In a first-of-its-kind drive, the state GST department is using Udyam MSME data to identify firms that could be liable for GST registration Businesses whose MSME records point to turnover above the registration threshold are being issued notices to submit extensive financial documents, including income tax returns, invoices, bank statements and tumover details. The notices have triggered anxiety among small firms that claim their actual turnover is below the applicable limit or that they deal mainly in exempt or non-taxable activities.