@jan_leila @t54r4n1 Unfortunately, I was misinformed and apologize for spreading that misinformation. Social Security still only allows you to specific M or F. They just let you use documents that say otherwise.From https://www.ssa.gov/people/lgbtqi/gender-identity.htmlYou will need to provide evidence to prove your identity, and sometimes citizenship or immigration status. The sex identification, if shown on your evidence document, can be binary (male or female) or non-binary (such as X). The sex identification does not have to match the sex identification currently on your Social Security record, or the sex identification you request.Currently, our record systems require a sex designation of female or male, and cannot accommodate a non-binary or unspecified sex designation, such as X. We are examining ways to address this in the future.