You can return to your Base Profile by clicking on "base profile" at the top of the report screen.
After returning to your base profile you can select any item and change the setting or update the data. For example, a married couple's model allows you to change the retirement date for either spouse by selecting the spouse's name and then changing the retirement date. The "retirement date" is an example of a selection that can be used again in other places in the program, for example, when you set the end of retirement account contributions to "retirement date."
After changing the retirement date or any other data, you can then rerun the base plan and note the change in discretionary spending to see the impact on your living standard.
Adding a special receipt or a special expense at any date will change the discretionary spending. Changing labor earnings to reflect part time work, working more (or less) will also change the discretionary spending. Any variable like inflation or rates of return can be changed and the consequent discretionary spending observed and compared to the discretionary spending in previous models.
Using Alternate Profiles is a better way to run comparison reports because instead of changing your base profile you preserve it and create an alternate for comparison. But when you have basic data to change such as Social Security earnings, age of death, interest rate on regular assets, for example, you should make the changes in the base profile.