Month-end mismatches rarely start on filing day. They start on busy afternoons when someone edits a rate by hand, skips a buyer GSTIN, or voids without a proper credit note trail.
Mistake 1: Treating HSN/SAC as optional
If product masters lack default codes and rates, every invoice becomes a guessing game. Put HSN/SAC and GST rate on the item once — then reuse it.
Mistake 2: Wrong CGST/SGST vs IGST breakup
Place of supply mistakes cascade into returns. Software should make tax type consistent with customer and seller location logic so cashiers are not inventing breakup under pressure.
Mistake 3: Informal credit and debit notes
WhatsApp “adjust kar do” is not a document trail. Use controlled credit/debit notes so returns and accounting stay aligned.
Mistake 4: Broken invoice series discipline
Multiple people typing free-form invoice numbers creates gaps and duplicates. Controlled series with role-based access protects auditability.
How to prevent these mistakes
- Clean product tax masters before peak season
- Train staff on voids and credit-note policy
- Export sales registers weekly, not only at month-end
- Prefer GST billing inside unified ERP as you grow
Continue with GST billing best practices and how to choose GST billing software.
How Bepaar Khata helps
Bepaar Khata under BepaarApp — developed by Ilmorix Technologies Pvt. Ltd. — keeps GST-oriented billing with inventory and accounting so invoice data stays usable for compliance and decisions.
Visit khata.bepaarapp.com or learn about Ilmorix Technologies.
Key takeaways
- HSN/SAC and rates belong in product masters
- Tax breakup errors create return mismatches
- Credit notes and series control protect the audit trail
- Weekly export habits beat month-end panic