Here is a fairly long discussion of the statute of limitations in legal malpractice in Alabama. They recognize the interesting question of whether the S/L starts to run before damage occures. For example, what if there is a mistake in creation of a will, but the will is not yet probated? Other examples are where there are problems in a deed or easement, but the house has not yet been re-sold. In any event, here is a well written discussion.