You do not report account balances to the government (unless you hold accounts over 10,000 in foreign countries), you only report your taxable income. Interest earned on savings is generally taxable income and you pay tax on that income.
You should have already paid taxes on that money when you earned it. If you are receiving interest, then your bank will send you a form so you can declare the interest, but not the balance.
I agree with Attorney Durr, but if you have withdrawn retirement monies from a retirement account and are referring to those monies as "savings," then they are taxable. I urge you to speak with a CPA about completing your taxes. It is money well spent.
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