> ## Documentation Index
> Fetch the complete documentation index at: https://developer.sandbox.co.in/llms.txt
> Use this file to discover all available pages before exploring further.
# GSTR-2A CDNA
> Get all amended credit/debit notes in GSTR-2A for a return period for authenticated taxpayer
#### Response schema
For successful responses, these resources describe the GSTN payload at `data.data`.
## OpenAPI
````yaml api-reference/gst/compliance/openapi.json GET /gst/compliance/tax-payer/gstrs/gstr-2a/cdna/{year}/{month}
openapi: 3.0.1
info:
title: compliance
description: >-
**GST Compliance API** enables businesses to automate compliance
requirements like [Taxpayer
verification](https://developer.sandbox.co.in/reference/search-gstin-api),
[GSTR
Filing](https://developer.sandbox.co.in/reference/gst-taxpayer-authentication),
[Generating
E-Invoices](https://developer.sandbox.co.in/reference/e-invoice-authentication-api),
and [E-Way
Bills](https://developer.sandbox.co.in/reference/e-way-bill-authentication-api).We
provide these APIs from GSTN-authorised GST Suvidha Providers, handling the
encryption-decryption and signing so you don't have to handle the
complexities.
version: 1.0.0
servers:
- url: https://api.sandbox.co.in
- url: https://test-api.sandbox.co.in
security: []
tags:
- name: Public
- name: Taxpayer
- name: Taxpayer Auth
- name: Returns
- name: GSTR-1 Documents
- name: File GSTR-1
- name: GSTR-2A Documents
- name: GSTR-2B Document
- name: File GSTR-3B
- name: GSTR-4
- name: File GSTR-9
- name: Invoice Management System
- name: GSTR-1A Documents
- name: File GSTR-1A
- name: Ledgers
- name: e-Invoice
- name: Sales e-Invoices for return period
- name: Purchase e-Invoices for return period
- name: Front Office Notices
- name: Front Office
- name: AATO
- name: e-Invoice1
- name: Authentication
- name: e-Invoice12
- name: E-Way Bill
- name: E-Way Bill1
- name: Authentication1
- name: Consignor
- name: Consolidated E-Way Bill
- name: Multi-Vehicle Movement
- name: Consignee
- name: Transporter
- name: Consolidated E-Way Bill1
- name: Multi-vehicle Movement
- name: Common
paths:
/gst/compliance/tax-payer/gstrs/gstr-2a/cdna/{year}/{month}:
get:
tags:
- Taxpayer
- Returns
- GSTR-2A Documents
summary: GSTR-2A CDNA
description: >-
Get all amended credit/debit notes in GSTR-2A for a return period for
authenticated taxpayer
operationId: getGstr2aCdna
parameters:
- name: year
in: path
description: ''
required: true
example: ''
schema:
type: string
- name: month
in: path
description: ''
required: true
example: ''
schema:
type: string
- name: counterparty_gstin
in: query
description: Filter by supplier / counterparty GSTIN
required: false
schema:
type: string
example: '{{ctin}}'
- name: authorization
in: header
description: >-
GST taxpayer access token. For token-generation steps, refer to the
[Generate Taxpayer
Session](/recipes/gst/authentication/generate_tax_payer_session)
recipe, then pass the token in the authorization header.
required: true
example: ''
schema:
type: string
- name: x-api-version
in: header
description: API version
required: false
example: ''
schema:
type: string
default: 1.0.0
- name: x-api-key
in: header
description: API key for identification
required: true
example: ''
schema:
type: string
responses:
'200':
description: 200 Success / RET13509 No data found
content:
application/json:
schema:
$ref: '#/components/schemas/GetGstr2aCdnaResponse'
examples:
200 Success:
summary: 200 Success
value:
code: 200
data:
status_cd: '1'
data:
cdna:
- cfs: 'Y'
ctin: 01ABCAP1123Q1ZS
nt:
- chksum: AflJufPlFStqKBZ
d_flag: 'Y'
diff_percent: 0.65
idt: 20-09-2023
inum: '915914'
inv_typ: R
itms:
- itm_det:
camt: 614.44
csamt: 621.09
iamt: 0
rt: 10.1
samt: 5.68
txval: 6210.99
num: 1
nt_dt: 23-12-2023
nt_num: '533515'
ntty: C
ont_dt: 23-09-2023
ont_num: '533515'
p_gst: 'N'
pos: '06'
rchrg: 'N'
val: 729248.16
timestamp: 1763446641000
transaction_id: 182ebce6-df57-4be7-9b07-2d9936a17550
RET13509 No data found:
summary: RET13509 No data found
value:
code: 200
data:
status_cd: '0'
error:
error_cd: RET13509
message: No document found for the provided Inputs
timestamp: 1763446641000
transaction_id: c65a8035-bbe6-4ffa-a70a-7f70ea79906b
headers: {}
deprecated: false
security: []
components:
schemas:
GetGstr2aCdnaResponse:
oneOf:
- $ref: '#/components/schemas/GetGstr2aCdnaSuccessResponse'
- $ref: '#/components/schemas/GstnBusinessErrorResponse'
description: >-
A GSTN success or GSTN business-failure response. Both variants use HTTP
200.
GetGstr2aCdnaSuccessResponse:
allOf:
- $ref: '#/components/schemas/TaxpayerResponseMetadata'
- type: object
required:
- data
properties:
data:
type: object
description: The GSTN success wrapper.
required:
- status_cd
- data
properties:
status_cd:
type: string
enum:
- '1'
description: GSTN success status.
example: '1'
data:
$ref: '#/components/schemas/GetGstr2aCdnaSuccessPayload'
GstnBusinessErrorResponse:
type: object
description: HTTP 200 response containing a GSTN business failure.
required:
- code
- timestamp
- transaction_id
- data
properties:
code:
type: integer
description: The HTTP status code reported in the response body.
enum:
- 200
example: 200
timestamp:
type: integer
format: int64
description: The response timestamp in Unix epoch milliseconds.
example: 1763446641000
transaction_id:
type: string
description: The transaction identifier used to trace the request.
example: 41bb8041-fb83-4654-8d75-85a19f329158
data:
type: object
description: The GSTN business-failure wrapper.
required:
- status_cd
- error
properties:
status_cd:
type: string
enum:
- '0'
description: GSTN business-failure status.
example: '0'
error:
$ref: '#/components/schemas/GstnBusinessError'
TaxpayerResponseMetadata:
type: object
description: Fields included in every taxpayer endpoint response.
required:
- code
- timestamp
- transaction_id
properties:
code:
type: integer
description: The HTTP status code reported in the response body.
enum:
- 200
example: 200
timestamp:
type: integer
format: int64
description: The response timestamp in Unix epoch milliseconds.
example: 1763446641000
transaction_id:
type: string
description: The transaction identifier used to trace the request.
example: 41bb8041-fb83-4654-8d75-85a19f329158
GetGstr2aCdnaSuccessPayload:
type: object
description: Successful GSTN payload for Get Gstr2a Cdna.
properties:
cdna:
type: array
description: The cdna value returned by GSTN.
items:
type: object
properties:
cfs:
type: string
description: R1_Fil_Status
cfs3b:
type: string
description: R3B_Fil_Status
dtcancel:
type: string
description: Date of cancellation of supplier
fldtr1:
type: string
description: Date of filing GSTR1/5 of supplier
flprdr1:
type: string
description: Filing period of GSTR1/5 of supplier
ctin:
type: string
description: Counter party gstin
nt:
type: array
description: The nt value returned by GSTN.
items:
type: object
properties:
chksum:
type: string
description: Checksum
idt:
type: string
description: Involice date
inum:
type: string
description: Involice number
val:
type: number
description: Note Value
pos:
type: string
description: >-
Maintained in GST System common database POS as provided
in law / actual provision of service.
rchrg:
type: string
description: Reverse Charge
inv_typ:
type: string
description: tax payer action
enum:
- R
- DE
- SEWP
- SEWOP
- CBW
d_flag:
type: string
description: delink flag
itms:
type: array
description: The itms value returned by GSTN.
items:
type: object
properties:
itm_det:
type: object
description: The itm det value returned by GSTN.
properties:
camt:
type: number
description: CGST amount
csamt:
type: number
description: CESS amount
iamt:
type: number
description: IGST amount
samt:
type: number
description: SGST amount
txval:
type: number
description: Taxval amount
rt:
type: number
description: Tax rate
num:
type: integer
description: Item number
nt_dt:
type: string
description: note date
nt_num:
type: string
description: note number
ont_dt:
type: string
description: original note date
ont_num:
type: string
description: original note number
aspd:
type: string
description: Original period in which invoice was added
atyp:
type: string
description: flag to determine type of amendment
p_gst:
type: string
description: Pre GST Regime Dr./ Cr. Notes
ntty:
type: string
description: note type
diff_percent:
type: number
description: Differential percentage
GstnBusinessError:
type: object
description: A business error returned by GSTN.
required:
- error_cd
- message
properties:
error_cd:
type: string
description: The GSTN business error code.
example: RET11416
message:
type: string
description: A human-readable description of the GSTN business error.
example: No records found.
````