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DGII 18 — ITBIS calculated incorrectly

ITBIS calculado incorrectamente

Field	Value
DGII code	`18`
Category	Validation
HTTP status	`422`
Retryable	No
Tenant fixable	Yes
`Problem.type`	`https://errors.api.erply.pro/dgii-18-itbis-mal-calculado`

Probable cause

The ITBIS computed by DGII from the line details does not match the amount declared in Totales/MontoTotalITBIS.

How to fix

Verify the ITBIS rate applied per line (0%, 16% or 18%).
The total ITBIS amount must be the exact sum (with two decimals) of the lines.

Example `application/problem+json` response

{
  "type": "https://errors.api.erply.pro/dgii-18-itbis-mal-calculado",
  "title": "ITBIS calculated incorrectly",
  "status": 422,
  "detail": "DGII code 18: ITBIS calculated incorrectly",
  "instance": "/v1/invoices",
  "correlationId": "1-65fa7c3a-6f9c2d8e0a1b2c3d4e5f6789",
  "dgii": {
    "code": "18",
    "trackId": "20260501-DGII-9988"
  }
}

Source

DGII PSFE Technical Spec + Norma 06-04. Exact citation pending review by the compliance specialist.

Probable cause
How to fix
Example application/problem+json response
Source