Once a beginning balance has been entered and locked for a fund, there is not an additional option to add a beginning balance for projects.
Before transactions can be posted to any accounts, the Beginning Balance of a fund needs to be locked. This can be locked at 0, or the beginning balance can be entered by account. (Please see BB55790 to determine which is best for your organization.)
Transaction characteristics can be added to this beginning balance to begin tracking, such as projects or transaction codes. However, if the beginning balances are locked at 0 or entered without the transaction characteristics and then locked, the amount entered will not be tracked with the characteristic. Journal entries would need to be made to allow for that amount to be tracked using the project, transaction code, etc.