FAQ: How Do the Taxable Income Values in the Advanced Options Affect Future Calculations

These values are specifically used to calculate income tested government benefits in the current year and the following year. This is because income tested benefits are typically based on prior year's income.

This is an important thing to fine tune if you're already receiving GIS but its quite nuanced and we would recommend meeting with a financial planner if you are lower income and trying to optimize for GIS.