Allow and disallow posting
Though a fiscal year is closed, you can still post general ledger entries to it. To prevent users from posting entries in a closed fiscal year, you can use the following setup:
General Ledger Setup - In the Allow Posting From and Allow Posting To fields on the General Ledger Setup page, you can specify a range in which it is allowed to post.
User Setup - The same fields can be found on the User Setup page and will take precedence over general ledger setup. For example, when the general setup allows users to post in the current month, the user setup can allow the accountant to still post in the previous month to make entries to close the month.