> ## 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. # Get GSTR-2A B2BA > Get all amended B2B invoices in GSTR-2A for a return period for authenticated taxpayer #### Response body schema ## OpenAPI ````yaml api-reference/gst/compliance/openapi.json GET /gst/compliance/tax-payer/gstrs/gstr-2a/b2ba/{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/b2ba/{year}/{month}: get: tags: - Taxpayer - Returns - GSTR-2A Documents summary: Get GSTR-2A B2BA description: >- Get all amended B2B invoices in GSTR-2A for a return period for authenticated taxpayer operationId: getGstr2aB2ba 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: '`optional` Counter party 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-key in: header description: API key for identification 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 responses: '200': description: 200 Success / RET13509 No data found content: application/json: schema: type: object properties: code: type: number example: 200 data: type: object properties: data: type: object properties: b2ba: type: array items: type: object properties: cfs: type: string example: 'Y' cfs3b: type: string example: 'Y' ctin: type: string example: 24ABCCR0123M1YZ fldtr1: type: string example: 10-Jan-24 flprdr1: type: string example: Dec-23 inv: type: array items: type: object properties: aspd: type: string example: Oct-23 atyp: type: string example: D chksum: type: string example: >- 6a93632fb89ac2028409a04ef1b538d38e9e50503b69c1ddd182570d61615aea idt: type: string example: 25-10-2023 inum: type: string example: RN1/FAMA-16557 inv_typ: type: string example: R itms: type: array items: type: object properties: itm_det: type: object properties: camt: type: number example: 0 iamt: type: number example: 0 rt: type: number example: 18 samt: type: number example: 0 txval: type: number example: 0.01 num: type: number example: 1418 example: - itm_det: camt: 0 iamt: 0 rt: 18 samt: 0 txval: 0.01 num: 1418 oidt: type: string example: 25-10-2023 oinum: type: string example: RN1/FAMA-16557 pos: type: string example: '24' rchrg: type: string example: 'N' val: type: number example: 0.01 example: - aspd: Oct-23 atyp: D chksum: >- 6a93632fb89ac2028409a04ef1b538d38e9e50503b69c1ddd182570d61615aea idt: 25-10-2023 inum: RN1/FAMA-16557 inv_typ: R itms: - itm_det: camt: 0 iamt: 0 rt: 18 samt: 0 txval: 0.01 num: 1418 oidt: 25-10-2023 oinum: RN1/FAMA-16557 pos: '24' rchrg: 'N' val: 0.01 example: - cfs: 'Y' cfs3b: 'Y' ctin: 24ABCCR0123M1YZ fldtr1: 10-Jan-24 flprdr1: Dec-23 inv: - aspd: Oct-23 atyp: D chksum: >- 6a93632fb89ac2028409a04ef1b538d38e9e50503b69c1ddd182570d61615aea idt: 25-10-2023 inum: RN1/FAMA-16557 inv_typ: R itms: - itm_det: camt: 0 iamt: 0 rt: 18 samt: 0 txval: 0.01 num: 1418 oidt: 25-10-2023 oinum: RN1/FAMA-16557 pos: '24' rchrg: 'N' val: 0.01 error: type: object properties: error_cd: type: string example: RET13509 message: type: string example: No document found for the provided Inputs status_cd: type: string example: '1' timestamp: type: number example: 1763446641000 transaction_id: type: string example: 28ddcef3-cea8-449b-bc59-7aac885e6216 examples: 200 Success: summary: 200 Success value: code: 200 data: data: b2ba: - cfs: 'Y' cfs3b: 'Y' ctin: 24ABCCR0123M1YZ fldtr1: 10-Jan-24 flprdr1: Dec-23 inv: - aspd: Oct-23 atyp: D chksum: >- 6a93632fb89ac2028409a04ef1b538d38e9e50503b69c1ddd182570d61615aea idt: 25-10-2023 inum: RN1/FAMA-16557 inv_typ: R itms: - itm_det: camt: 0 iamt: 0 rt: 18 samt: 0 txval: 0.01 num: 1418 oidt: 25-10-2023 oinum: RN1/FAMA-16557 pos: '24' rchrg: 'N' val: 0.01 status_cd: '1' timestamp: 1763446641000 transaction_id: 28ddcef3-cea8-449b-bc59-7aac885e6216 RET13509 No data found: summary: RET13509 No data found value: code: 200 data: error: error_cd: RET13509 message: No document found for the provided Inputs status_cd: '0' timestamp: 1763446641000 transaction_id: 9f98706e-6745-4963-9bbe-e0c85833bc8b headers: {} deprecated: false security: [] ````