Answer :
Final answer:
Disposable income is crucial for budgeting, and after-tax income data is vital for estimating future income.
Explanation:
Disposable income is the money available for spending after taxes have been deducted. It is an essential factor when creating a budget, as it reflects the actual funds one has to work with. Using after-tax income data to estimate future income provides a more accurate picture of what one can expect to have available for expenses and savings.
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