- CPIN – Common Portal Indentification Number. (14 Digit, Valid for 15 days.)
- CIN – Challan Indentification Number. (17 Digit where 14 Digit CPIN + 3 Digit Bank Code.)
- BRN – Bank Reference Number ( Transaction Number)
- E-FPB – Electronic Focal Point Branch.
- Major Heads – IGST, CGST, SGST/UTGST, CESS
- Minor Heads – Tax, Interest, Penalty, Fee, Others
- E-Ledgers – E-Cash, E-Credit, E-Liability.
- GSPs – GST Suvidha Providers
- ASPs – Application Service Providers
- ITC – Input Tax Credit
- ISD – Input Service Distributor
- LUT – Letter of Undertaking
- SEZ – Special Economic Zone
- EOUs – Export Oriented Units
- BoS – Bill of Supply
- JsON – JavaScript Object Notation
- P2P – Principal to Principal
- P2A – Principal to Agent
- B2B – Busines to Business
- B2C – Business to Customer
- B2BUR – Business to Unregistered Business
- HSN – Harmonized System of Nomenclature Code
- SAC – Service Acconting Code
- EBN – E-Way Bill Number
- EVC – Electronic Verification Code
- ARA – Application for Advance Ruling
- FC – Facility Center
- UIN – Unique Identification Number
- GSTIN – Goods & Service Tax Identification Number
- UTGST – Union Territory Goods & Service Tax
- CGST – Central Goods & Service Tax
- SGST – State Goods & Service Tax
- IGST – Integrated Goods & Service Tax
- NEFT – National Electronic Fund Transfer
- RTGS – Real Time Gross Settlement
- SCN – Show Casue Notice
- RCM – Reverse Charge Mechanism
- OCPB – Over the Counter Payment in Branches
- ARN – Application Reference Number
- DSC – Digital Signature Certificate
