After preparing a partnership return that required a special allocation under Income, Ordinary Business Income (Loss) we made the special allocated. After the client called with a question we noticed that the special allocation was no longer there which made the tax return incorrect that was provided to the client. I assume the information was deleted when an update was done. This is a bad situation as the return could have been e-filed incorrectly if the client had not called. Anybody know how to keep this from happening again.This needs to be resolved so that it does not happen again.