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RSIO — Website & App Developer in Charaideo, Sonari, Assam
RSIOBuilding Digitally

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Tax & Compliance May 28, 2026 4 min read

Top 5 GST Registration Mistakes That Startups Make

C
Compliance TeamAuthor, RSIO Editorial

Registering for Goods and Services Tax (GST) is a major milestone for any rising business. However, incorrect registrations can lead to audits, delayed Input Tax Credit (ITC) claims, and regulatory fines. Here are the top five errors we resolve for newly formed enterprises.

1. Selecting the Wrong Jurisdiction GST is administered by regional state and central tax commissioners. Choosing the incorrect ward can cause officials to reject your application, requiring you to file from scratch and delaying operations by weeks.

2. Not Uploading Proper Proof of Address The GST portal requires clear property documents. Uploading a blurry electricity bill or a rent agreement lacking witness signatures is the primary trigger for a GST Clarification notice (Form GST REG-03).

3. Misclassifying HSN/SAC Codes Your HSN (Goods) and SAC (Services) codes define your tax rate. Registering with incorrect codes can cause billing disputes and lead to tax audits. Always consult with a certified CA to verify your primary business codes.