COST - Council on State Taxation

Amicus Briefs

Pacific Bell Telephone Company et al. v. County of Napa, et al.

COST has filed an amicus letter in Pacific Bell Telephone Company et al. v. County of Napa, et al., urging the California Supreme Court to grant review and provide clear guidance on the California constitutional provisions governing the assessment and taxation of utility property.

COST - Council on State Taxation

COST Studies, Articles & Reports

2025 State and Local Amnesty Programs

Tracker of most state and local tax amnesty programs enacted and conducted in 2025.

COST - Council on State Taxation

COST Comments & Testimony

Comments on Draft Report of Legislative Work Group to Study BPOL Out-of-State Deduction - 2025 House Bill 1743

On September 15, COST submitted comments to the Virginia BPOL Study Group encouraging them to recommend, consistent with earlier guidance from the Department of Taxation, that the legislature clarify that “income or other tax based on income” as used in the statute[1] includes not just “net income tax” but also “gross income tax.”