DOCS/FLUX/Vat Filing

Batch Filing

Submit multiple VAT transactions in a single request for processing and filing via the FLUX API. This endpoint is designed for high-volume or scheduled submissions, enabling efficient bulk processing.

Use this when:

You are filing VAT for multiple sales or invoices at once
You want to reduce API calls through aggregation
You are running scheduled or end-of-period filings

HTTP Request

POSThttps://api.taxstreem.com/v1/flux/vat-filing/batch

Request Body

The following parameters are required for this action.

Parameter	Type	Description
batchId	string	Unique identifier for the batch.
payload	array	List of single filing objects (encryptedPayload, month, year, vatStatus, item, amount, narration, taxId, beneficiary).

Encrypted Payload (In-Flight Encryption)

FLUX requires sensitive credentials to be encrypted at the application layer before transmission. This provides defense-in-depth on top of HTTPS.

The encryptedPayload field must contain a Base64-encoded AES-256-GCM encrypted JSON object.

Encryption Specification

Property	Value
Algorithm	AES-256-GCM
Key Derivation	SHA-256(sharedSecret)
IV (Nonce)	12 bytes (96-bit) random
Auth Tag	16 bytes (128-bit)
Encoding	Base64

Payload Format

The final transmitted value must be:

Base64( IV[12] || Ciphertext || AuthTag[16] )

IV is randomly generated per request
Ciphertext is encrypted JSON
AuthTag is automatically appended by GCM

Example Request

curl -X POST https://api.taxstreem.com/v1/flux/vat-filing/batch \
  -H "x-api-key: txsm_test_SK489c..." \
  -H "Content-Type: application/json" \
  -d {
    "batchId": "batch_123",
    "payload": [
      {
        "encryptedPayload": 'encrypted_string_...',
        "filingId": '123-abuiod-90',
        "month": 1,
        "year": 2024,
        "data": [
           {
               "vatStatus": 1,
               "amount": 5000,
               "item": "Baby diapers",
               "narration": "Bought kisskid diaper",
               "taxId": "2345544-0001",
               "beneficiary": "Retail Customer"
           }
        ]
      }
          ]
     }

Example Response

202 Accepted

{
  "status":  "accepted",
  "message":  "schedule accepted successfully",
  "data":  {
    "id":  "xaee2ddf-effvkfes",
    "created_at":  "2026-02-20T10:00:00Z"
  }
}