Eighteen crypto businesses and organizations have filed an amicus brief supporting a legal challenge to Illinois’ Digital Asset Tax Act. The coalition includes a16z, DeFi Education Fund, Paradigm, Uniswap, Aave Labs, Aptos Labs, Chainlink Labs, Multicoin Capital, Phantom Technologies and the Solana Policy Institute. Illinois proposes a 0.2% tax on digital asset activity involving firms with more than $100,000 in receipts. The measure is currently on hold amid litigation, after the state agreed to a six-month delay from its planned Jan. 1 implementation. The industry argues that the law’s definitions are too vague and discriminatory because they could encompass developers and providers of non-custodial software that lack custody of assets, customer accounts, payment access and user-location information. The Blockchain Association, Crypto Council for Innovation and The Digital Chamber previously sued after Governor JB Pritzker signed the legislation.