Here:
Update (5-30-18):
supplemental brief for respondent in response to brief of us solicitor general
Here are the materials in Washington State Dept. of Licensing v. Cougar Den Inc.
taxation
NCAI Amicus Brief in South Dakota v. Wayfair, Inc.
United States Tax Court Holds Income Earned from Seneca Lands is Taxable
Here is the opinion in Perkins v. Commissioner:
IRS Advance Notices for Indian Taxpayers and Alaska Native Settlement Funds
Here:
D.C. Circuit Briefs in Ho-Chunk Inc. v. Sessions
Ninth Circuit Briefs in Agua Caliente Band of Cahuilla Indians v. Riverside County
Here:
desert water agency answer brief
county association amicus brief
Oral argument video here.
Lower court materials here.
Wisc. Court of Appeals Affirms Dismissal of DNR Claims
Here are the materials in the matter of Wisconsin Department of Natural Resources v. Timber and Wood Products Located in Sawyer County et al, 2017AP181 (Dec. 19, 2017):
Update in Comenout Litigation II
Here are updated materials in Comenout v. Pittman (formerly Comenout v. Pierce County Superior Court) (W.D. Wash.):
70 DCT order dismissing complaint
77 DCT order granting motion to file amended complaint
103 state official motion to dismiss
Prior posts here.
Update in KBIC Suit against Michigan Treasury Dept.
Here are the materials in Keweenaw Bay Indian Community v. Khouri (W.D. Mich.):
99 state motion re state prosecutions
115 kb motion for protective order
Federal Court Dismisses Seminole Challenge to Florida Utilities Tax
Here are the materials in Seminole Tribe of Florida v. Biegalski (S.D. Fla.):
Turtle Talk 
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