For my business, we issue Credit Notes to customers which expire in varying time periods (10 days, 30 days, or 1 year). I would like a way to set an expiration date so the customer cannot use that credit note after the date.

More importantly, the credit should show on the Balance Sheet from the date of issuance to the date of expiration, and afterward should not be seen on the balance sheet. It is an actual liability if used and Zoho Books should record it as such and allow it to remain active for a certain time period.

The current implementation doesn't allow Credit Notes from the previous year to be on the books in 2019 for example and then to be expired in 2020. Right now, the only solution is to manually open each Credit Note and void it. However, voiding a Credit Note in 2020, will remove it from the Balance Sheet in 2019 and therefore your tax return will not match what you reported last year. There needs to be a way to allow transactions where were active in 2019 to remain active in 2019 and then update or change in 2020. You should not have to unlock your transactions to void out a transaction from a previous year. That is not correctly reflecting the state of the business.

Same notion applies for Vendor Credits - need expiration date to write them off at a set point in time and reset the Balance Sheet at the start and end point of the life of the Vendor Credit.