# Generar lineas de IVA no grabado a Comprobantes de Compras
subcompania_id = 1
facturas = self.env['account.invoice'].search([('subcompania_id', '=', subcompania_id), ('state', 'not in', ['draft', 'cancel']), ('tax_line', '=', False), ('amount_tax', '=', 0), ('type','in', ['in_invoice', 'in_refund'])])
iva = self.env['account.tax'].search([('tipo', '=', 'iva'), ('type_tax_use', '=', 'purchase'), ('type', '=', 'none')])
if len(iva) > 1:
    raise Warning("Se encontro mas de un iva no grabado")
for fc in facturas:
    self.env['account.invoice.tax'].create({
        'account_id': iva.account_collected_id.id,
        'invoice_id': fc.id,
        'tax_code_id': iva.tax_code_id.id,
        'base': fc.amount_untaxed,
        'base_amount': fc.amount_untaxed * fc.cotizacion,
        'tax_amount': 0,
        'amount': 0,
        'name': iva.name,
        'impuesto_id': iva.id,
    })