Registration and Updates

• Businesses crossing threshold turnover must register under GST
  
• Details like business name, address, and bank accounts must be updated regularly
  
• Multiple registrations required for branches in different states
  
• Cancellation of registration must be initiated when eligibility ends
  
• Timely amendment of core and non-core fields is mandatory
  

Return Filing and Payment

• Taxpayers must file monthly or quarterly returns depending on scheme
  
• GSTR-1 (sales), GSTR-3B (summary), and annual returns like GSTR-9 are compulsory
  
• Tax must be paid by the due date to avoid interest and penalty
  
• Late filing attracts late fees and interest under law
  
• Separate returns apply for composition scheme taxpayers
  

Invoice and Documentation

• Taxpayers must issue GST-compliant invoices for all taxable supplies
  
• Include HSN/SAC codes, GSTIN, tax rate, and supply details
  
• Maintain books of accounts, purchase and sales registers, and stock records
  
• E-way bill generation required for goods movement above ₹50,000
  
• Preserve records for minimum six years for audit or inspection
  

Input Tax Credit Management

• Claim credit only for eligible goods or services used for business
  
• Reverse ITC when conditions are not met or goods are used for exempt supply
  
• Match GSTR-2B with inward supply to confirm eligibility
  
• Maintain separate ITC ledger in books and reconcile monthly
  
• Avoid blocked credits under Section 17(5) (e.g., food, travel, etc.)
  

Responding to Notices and Audits

• Timely response to notices, assessments, and audit queries is mandatory
  
• Cooperate with GST officers during inspection or investigation
  
• Submit correct documents and explanations when required
  
• Avoid suppression of facts or misrepresentation
  
• Non-compliance may lead to penalties, interest, or prosecution