Zero Sales GST Filing flags periods where the borrower files nil or zero-sales GST returns despite claiming business activity. In MSME underwriting, it is read along with financial statements, bank statements, GST data and existing obligations to judge cash-flow strength and repayment capacity. The trend is usually more important than one isolated number, because MSME financials can be affected by seasonality, accounting treatment and one-off events. For example, sales should be reconciled with GST returns, bank credits and audited financials before being used for limit assessment. It matters because financial interpretation can change the view on leverage, liquidity, profitability, debt-service ability and the borrower’s real operating strength. The common caution is to check calculation basis, period, exceptional items, related-party entries and consistency with GST, bank statement and audit data.