<Mention Recipient’s Address Here>
Dear <Recipient’s Name>,
Currently, <I/We> have a tax audit scheduled for <date>. Unfortunately, circumstances have made it impossible for <me/us> to meet the requirements for the audit by that date. <I/We> <am/are> writing in the hopes that the date can be changed.
If possible, <I/We> would like the audit moved back to <date> or later. This would give <me/us> sufficient time to prepare. Please contact <me/us> to confirm this arrangement or if there is a problem.
Thank you very for your time and consideration. Would be looking forward to your response at the earliest
Encl: <List of enclosed items goes here>