Apologies if this is a well known feature in TTax, but it certainly was new to me.
There is a ‘What If’ worksheet that is available in TTax (in the CD or downloaded version), apparently for a while. It aids in planning changes in the next years taxes, allowing you to take your baseline taxes and apply several changes - all at a glance.
This will be easier and better than what I had been doing, which is saving a copy of a return and making changes and reviewing in forms what affects the one set of changes had.
The worksheet can be found in
Search for ‘what’
There’s an article on the FinanceBuff on it.