def METHOD_NAME(self, wizard_values, report_type):
    wizard_action = self.env.ref(
        "l10n_it_financial_statements_report.action_financial_statements_wizard"
    )
    wizard_model = wizard_action.res_model
    wizard_context = safe_eval(wizard_action.context) or dict()
    wiz = (
        self.env[wizard_model]
        .with_context(
            discard_logo_check=True,
            **wizard_context,
        )
        .create(wizard_values)
    )
    if report_type == "pdf":
        report_action = wiz.button_export_pdf()
    elif report_type == "xlsx":
        report_action = wiz.button_export_xlsx()
    else:
        raise Exception(
            "Report Type {report_type} not supported".format(
                report_type=report_type,
            )
        )
    return report_action