all returns are double checked.. in all these years almost zero problem returns.. i enter the w-2s, interest income etc.. then i go back and take my calculator, if there are more than one w-2s or more than one 1099-INTs for example.. add them on my ten-key. compare to the screen. they match up then golden. i would never trust anyone to review my work.. all my clients know how it works.. they come in.. return is prepared with them there.. and they continually refer me to their friends. .. it is only 02.19 and flipped my voice mail message back to saying how i cannot take new clients... i agree not everyone's method of doing taxes but it works for me 🙂