curl --request POST \
  --url https://api.sandbox.co.in/gst/compliance/tax-payer/gstrs/gstr-3b/{year}/{month}/offset-liability \
  --header 'Content-Type: application/json' \
  --header 'authorization: <api-key>' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "pdcash": [
    {
      "liab_ldg_id": 0,
      "trans_typ": 30002,
      "ipd": 24217,
      "cpd": 0,
      "spd": 0,
      "cspd": 0,
      "i_intrpd": 0,
      "c_intrpd": 0,
      "s_intrpd": 0,
      "cs_intrpd": 0,
      "c_lfeepd": 0,
      "s_lfeepd": 0
    },
    {
      "liab_ldg_id": 0,
      "trans_typ": 0,
      "ipd": 0,
      "cpd": 0,
      "spd": 0,
      "cspd": 0,
      "i_intrpd": 0,
      "c_intrpd": 0,
      "s_intrpd": 0,
      "cs_intrpd": 0,
      "c_lfeepd": 0,
      "s_lfeepd": 0
    }
  ],
  "pditc": {
    "liab_ldg_id": 0,
    "trans_typ": 30002,
    "i_pdi": 421,
    "i_pdc": 1181,
    "i_pds": 1181,
    "c_pdi": 0,
    "c_pdc": 0,
    "s_pdi": 0,
    "s_pds": 0,
    "cs_pdcs": 0
  }
}
'

{
  "code": 200,
  "data": {
    "status_cd": "0",
    "error": {
      "error_cd": "RT-3BGV1005",
      "message": "Return period is invalid. If error persists quote error number RT-3BGV1005 when you contact customer care for quick resolution"
    }
  },
  "timestamp": 1763446641000,
  "transaction_id": "71c5bead-7e71-4abf-8754-6e71180c0060"
}