TaxTMI 
TaxTMI 
TaxTMI 
E-invoice is applicable to those taxpayers whose aggregate turnover is more than ₹ 500 Crores. E-invoice is coming into effect from 01.10.2020.
Following persons are exempted from e-invoice
1.Special Economic Zones,
2. Insurer or a Banking company or a financial institution, including a non-banking financial company,
3. goods transport agency,
4. supplier of taxable service supplying passenger transportation service,
5. a registered person supplying services by way of admission to exhibition of cinematographic films in multiple screens.
Tax invoice will not be considered valid if IRN is not mentioned on it. Hence, IRN is a mandatory field. The Invoice Registration Portal will generate IRN and send it back to the taxpayer who will then print it on his tax invoice. IRN is a unique reference number for the invoice.
Recently, new schema /format of e-invoice has been released by Govt. As per the same following fields are mandatory
Supply Type:
B2B : Business to Business
B2C : Business to Consumer
SEZWP : To SEZ with payment
SEZWOP : To SEZ without payment
EXPWP : Export with payment
EXPWOP : Export withou payment
DEXP : Deemed Export
Document Type
INV for invoice
CRN for credit note
DBN for debit note
Document number and date
Number - 16 digits as per CGST Rules
Date format - 'DD/MM/YYYY'
Supplier information
Supplier Legal Name: Legal name, as appearing in PAN of the supplier
GSTIN of the supplier
Supplier Address, Supplier Place
Supplier State Code, Supplier PIN code
Recipient information
Recipient Legal Name; as per PAN
GSTIN of the Recipient, if availabe. URP : In case of exports or if supplies are made to unregistered persons
Place of supply (State code)
Recipient address; Recipient Place
Recipient State Code
Invoice Item Details
Item list
Document Total
Total Taxable Value (sum of the taxable values of all the items in the document); Total Invoice value in INR
All the above fields are mandatory for generating e-invoice. It means a taxpayer has to send these information which the NIC portal will validate and provide IRN to the taxpayer if all the details are found correct. Otherwise , NIC will give an error message.
Source: https://www.cbic.gov.in/resources//htdocs-cbec/gst/GST-Update010820.pdf