There is a little known provision in the social security rules that allow you to return all the payments you have received so far in return for a recalculated new monthly benefit. The money you’d need to return does not include any interest, so if you are 70 years old and had started collecting social security at age 62, you are returning those funds with cheaper dollars. Also, if you had been taxed on any portion of those prior benefits, you may claim the tax as a credit in the year you pay back the accrued payments. After you reimburse the SS office, you reapply for your new benefit. See “Request for withdrawal of application” at IRS.gov or contact your local social security administration office for more details.
For another bloggers advice see Increase Social Security Benefits by The Military Wallet.