- AIS
- Annual Information Statement: the income-tax record of your income and transactions.
- CIN
- Corporate Identity Number given to every company on incorporation.
- DIN
- Director Identification Number, needed to become a company director.
- DSC
- Digital Signature Certificate used to sign filings on MCA and tax portals.
- EPF
- Employees' Provident Fund: retirement savings funded by employee and employer.
- ESI
- Employees' State Insurance: health cover for lower-paid employees.
- Form 26AS
- Statement of tax deducted, collected and paid against your PAN.
- GSTIN
- 15-character GST registration number, unique to each state registration.
- GSTR-2B
- Auto-drafted monthly statement of input tax credit available to you.
- HSN
- Harmonised code that classifies goods for GST rates and invoices.
- IRN
- Invoice Reference Number generated for each e-invoice.
- ITC
- Input tax credit: GST paid on purchases, set off against GST on sales.
- LLP
- Limited Liability Partnership: partnership with limited liability for partners.
- MCA
- Ministry of Corporate Affairs, which runs company and LLP filings.
- PAN
- Permanent Account Number, the 10-character income-tax ID.
- QRMP
- Quarterly return, monthly payment scheme for smaller GST taxpayers.
- RCM
- Reverse charge: the buyer, not the seller, pays the GST.
- ROC
- Registrar of Companies, where annual and event filings are made.
- SAC
- Services Accounting Code: the HSN equivalent for services.
- TAN
- Tax Deduction Account Number, required to deduct and deposit TDS.
- TCS
- Tax collected at source by certain sellers and e-commerce operators.
- TDS
- Tax deducted at source by the payer before paying you.
- UAN
- Universal Account Number that follows an employee's PF across jobs.
- Udyam
- Government registration that certifies a business as an MSME.