Final answer:
To find your current expenses when building your budget, you should review your bank and credit statements.
Step-by-step explanation:
When building a budget, you should look to find your current expenses in your bank and credit statements. These statements will show you the various transactions and charges you have made, allowing you to track your spending and understand your expenses. By reviewing your statements, you can identify areas where you may need to cut back and make adjustments to your budget.