The TT program meant to handle 90% of situations but not 100% ... some things will never be handled by any DIY program and will either need a professional program or manual overrides in the FORMS mode of the downloaded version.
From a cost effectiveness point of view (since TT is a for profit public company) there are some things the program will never handle since they are so uncommon it doesn't make fiscal sense to dedicate staff to those forms and/or they are too difficult to integrate. Even my professional program will not handle some unusual situations and manual entries must be calculated and entered on the forms directly.
