The Trump administration is proposing sweeping changes to the rules governing the 2030 US Census, including a requirement that could make questions about biological sex mandatory for respondents, a change critics say could effectively force transgender people to disclose their trans status to the federal government.
Anatomy and hormones you produce, yes. Injecting yourself with massive amounts of synthetic testosterone or estrogen isn’t part of your biological sex. Just mark whatever the hell you want, it’s a stupid survey. If you need it to validate yourself you have a lot bigger problems.