I wrote a letter to include with my census form. It reads as follows:

Dear Census Bureau,
As the Constitutional purpose for the census is strictly a head count to determine representation, I have provided only that information. I will give no other information, as I refuse to be an enabler of gerrymandering or government sanctioned racism. If you absolutely must have an answer, feel free to make something up, just leave me out of it. Thank you.

Sincerely,
Occupant (followed by my address)