A. If it is within 30 days of your first regular annuity payment, you may file a new election in writing. You should send the election to:U.S. Office of Personnel Management Retirement Operations Center, Post Office Box 45, Boyers, PA 16017.Your first regular monthly payment is the first one paid in an amount other than the estimated amount or the adjustment payment after the government has computed your regular annuity amount. If you change your election to anything other than the maximum, you must obtain your spouse’s consent or a waiver of the consent requirement. Please visit the following site for information about consent or waiver: http://www.opm.gov/retirement-services/retirement-faqs/#4. After the 30-day period has passed, you can change your election only under the following circumstances: If it is more than 30 days from the date of your first regular monthly payment, but less than 18 months from the beginning date of your annuity, you may change your decision not to provide a survivor annuity, or you can increase the survivor annuity amount.You must request the change in writing to:U.S. Office of Personnel Management Retirement Operations Center, Post Office Box 45, Boyers, PA 16017You must also pay a one-time payment representing the difference between the old and new election amounts. This one-time payment also includes a percentage of your annual benefit. The percentage is 24.5% of your annual benefit if you are changing from no survivor benefit to a full survivor benefit or 12.25% if you are changing from no survivor benefit to a partial one. Interest is also charged at the rates shown in the table at the following site: http://www.opm.gov/retirement-services/benefits-officers-center/reference-materials/#url=Glossary#I. Your written election should include your claim number, the amount of your new survivor election, and your spouse’s name, Social Security number, date of birth, and a copy of your marriage certificate.