You have 30 days to appeal. The clock starts when you receive written notification from the Small Business Administration (SBA).
What to Do If You’re Denied PPP Loan Forgiveness
This is an important element of the 30-day time frame. It’s NOT 30 days from the time your lender received the notification. It’s 30 days from when YOU received the notification.
In other words, if your lender calls you with that news, have the SBA notification letter time stamped with that day’s date when you receive the letter.