<p>Goods and Services Tax (GST) has been the cornerstone of India's indirect tax system since July 2017. If you are running a business in India, understanding when and how to register for GST is essential — both for compliance and for unlocking the benefits of the input tax credit system.</p><h2>Who Must Register for GST?</h2><p><strong>Mandatory Registration:</strong> Any business with an aggregate annual turnover exceeding ₹40 lakhs (₹20 lakhs for service providers, ₹10 lakhs for special category states) must register for GST. Additionally, certain businesses must register regardless of turnover — including e-commerce operators, inter-state suppliers, casual taxable persons, and businesses liable to pay tax under reverse charge.</p><p><strong>Voluntary Registration:</strong> Even if your turnover is below the threshold, voluntary GST registration is often beneficial. It allows you to claim input tax credit on purchases, makes your business appear more credible to corporate clients, and is often required by larger buyers who want to claim ITC on their purchases from you.</p><h2>Documents Required for GST Registration</h2><p>The following documents are required for most business types: PAN of the business/proprietor, Aadhaar of the authorised signatory, proof of business registration (Certificate of Incorporation, partnership deed, etc.), address proof of principal place of business, bank account details (cancelled cheque or bank statement), and a digital photograph of the authorised signatory.</p><h2>The GST Registration Process</h2><p><strong>Step 1 — Part A of REG-01:</strong> Visit the GST portal (gst.gov.in) and fill in Part A of Form GST REG-01 with your PAN, mobile number, and email. An OTP-based verification is done on both mobile and email.</p><p><strong>Step 2 — Part B of REG-01:</strong> Fill in the detailed application in Part B — business details, promoter information, authorised signatory, principal place of business, and bank account details. Upload all required documents.</p><p><strong>Step 3 — Application Reference Number (ARN):</strong> On successful submission, an ARN is generated. The GST officer has 7 working days to process the application (3 days for Aadhaar-authenticated applications).</p><p><strong>Step 4 — GSTIN Issuance:</strong> Once approved, a 15-digit GSTIN (GST Identification Number) is issued. This is your unique tax identity for all GST transactions.</p><h2>Key Compliance After Registration</h2><p>After obtaining your GSTIN, you must file regular returns: GSTR-1 (outward supplies, monthly or quarterly), GSTR-3B (monthly summary return and tax payment), and GSTR-9 (annual return). Failure to file returns on time attracts late fees and interest.</p><p>The GST system also requires businesses to reconcile their purchase data (GSTR-2B) with their books to ensure accurate ITC claims. This reconciliation is critical and often overlooked by small businesses.</p><h2>Common GST Mistakes to Avoid</h2><p>Missing the registration deadline, incorrect HSN/SAC code classification, not reconciling GSTR-2B before claiming ITC, and filing nil returns when transactions exist are among the most common errors that attract GST notices.</p><p>Harp Samra International's GST team handles registration, return filing, reconciliation, and notice responses — ensuring your business stays fully compliant while you focus on growth.</p>