Proof that Involuntary Income Taxation of Your Labor is Slavery
SEDM publishes a a free memorandum of law that you can use to prove that involuntary taxation of your own labor is slavery:
Proof that Involuntary Income Taxation of Your Labor is Slavery, Form #05.055 (OFFSITE LINK)
https://sedm.org/Forms/05-MemLaw/ProofIncomeTaxLaborSlavery.pdf