/**
 * CUIT (Clave Única de Identificación Tributaria) normalizer · Argentina
 *
 * Reference: Administración Federal de Ingresos Públicos (AFIP)
 *   · https://www.afip.gob.ar
 * Format: XX-XXXXXXXX-X (11 digits with embedded checksum digit).
 *
 * The same algorithm applies to CUIL (Clave Única de Identificación
 * Laboral). The leading two digits indicate the entity kind.
 */
/**
 * Normalize a CUIT/CUIL to canonical "XX-XXXXXXXX-X" form.
 */
export declare function normalizeCuitAR(input: string): string;
/**
 * Compute the CUIT verifier digit per AFIP algorithm (modulo-11).
 */
export declare function computeCuitVerifierAR(firstTenDigits: string): string;
/**
 * Validate format and checksum of an Argentine CUIT/CUIL.
 */
export declare function isValidCuitAR(input: string): boolean;
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