Make it illegal to withhold tax money for the federal government, make it illegal to share information with them, make it illegal for them to seize property or to aid them in seizing property, and to make it illegal to assist in prosecution of federal tax "crimes". make it illegal to follow orders to freeze assets or accounts.
After that, we need to have state money or agree to an alternate currency so the fed can't kill us with the inflation tax while they print up money for all the blue states. States and counties should seriously consider requiring prices, contracts, pay, fuel, mortgages, and rent to be denominated in goldbacks, even if they accept tender in some other currency.
PS: a goldback is a standard unit of currency defined as 1/1000 th of an ounce of gold.