Per SSA 570(revised), we should assess the period same as management assessment at least, but not limited to, 12 months from the date of financial statement (i.e. year end date). This is to assess the going concern assumption is appropriate.
per Para. A15 of SSA570. Other than inquiry of management, auditor does not have a responsibility to perform any other audit procedures to identify events or conditions that cast significant doubt on the entity’s ability to continue as a going concern, would be at least 12 months from the date of the financial statement. Be mindful to identify events and condition. So we need to inquire only, no need to do other audit procedures to identify events or conditions. But we still need to assess the going concern assumption is appropriate.