If you're looking for general information about how this calculator works, please see the About page. Alternatively, for the most detailed information, you can view the source code on GitHub.
If you have a question about how benefits are calculated, please see the following articles, which answer the most common questions:
While I made this calculator available for free, I cannot also provide free consultations. If you are interested in a personal consultation, you can find more information here.
If you believe you have found a bug and would like to report it, please feel free to report it as an "issue" on the project's GitHub page. When submitting an issue report, please copy the link that appears in the paragraph below the "submit" button on the calculator, in order to provide me with inputs that you provided to the calculator. Please do not submit feature requests as "issues." I will not be creating additional features for the calculator. The calculator is open-source. If you would like additional features, you're welcome to create them yourself.
Finally, if you simply have a question about why the calculator is recommending a particular filing date, you may want to start a conversation on the Bogleheads Forum. There are many forum members who are familiar with the calculator.