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blogs

Sphere's Global Compliance Blog

Find regional guides, tax developments and thought leadership at the intersection of AI and tax here

Building TRAM | The World’s First Tax Review and Assessment Model

Sphere's AI-native tax research system that interprets global indirect tax rules, builds product taxonomies, and automates taxability and rate determinations.

Alex Bowcut
23 Nov 2025
AI

Sphere Raises $21M Series A Led by Andreessen Horowitz

Sphere secured a $21M Series A led by a16z to build the first AI-native cross-border compliance engine, meeting rising demand for scalable global tax solutions.

Nick Rudder
18 Nov 2025
Announcements

What Is a Tax Exempt Certificate?

What is a tax exempt certificate? Learn how SaaS companies use them, who qualifies, and how to stay compliant across U.S. states and beyond.

Jennifer Dunn
10 Apr 2026
Indirect Tax

What Is a VAT/GST ID? Global Tax Guide for SaaS

Do you need a VAT or GST ID for global SaaS sales? This guide covers registration, verification, and compliance tips every CFO should know.

Jennifer Dunn
10 Apr 2026
SaaS

What Is a Tax Exempt Certificate?

What is a tax exempt certificate? Learn how SaaS companies use them, who qualifies, and how to stay compliant across U.S. states and beyond.

Jennifer Dunn
10 Apr 2026
Indirect Tax

What Is a VAT/GST ID? Global Tax Guide for SaaS

Do you need a VAT or GST ID for global SaaS sales? This guide covers registration, verification, and compliance tips every CFO should know.

Jennifer Dunn
10 Apr 2026
SaaS

Building TRAM | The World’s First Tax Review and Assessment Model

Sphere's AI-native tax research system that interprets global indirect tax rules, builds product taxonomies, and automates taxability and rate determinations.

Alex Bowcut
23 Nov 2025
AI

Sphere Raises $21M Series A Led by Andreessen Horowitz

Sphere secured a $21M Series A led by a16z to build the first AI-native cross-border compliance engine, meeting rising demand for scalable global tax solutions.

Nick Rudder
18 Nov 2025
Announcements

U.S. Tax Residency Certificate: Complete Application Guide

Learn how to get a U.S. tax residency certificate (Form 6166) via Form 8802. Covers fees, timeline, eligibility, treaty benefits, and what to do if denied.

Jennifer Dunn
07 May 2026
Regional Guides

Multiple Points of Use Exemption: A Complete Guide

Read how multiple points of use (MPU) exemption lets businesses self-assess sales tax by location. Covers state rules, claiming steps, and allocation methods.

07 May 2026
Indirect Tax

VAT in Europe: Rates, Rules & Compliance Guide for Businesses

Your guide to VAT in Europe: how it works, current rates by country, registration rules, OSS, ViDA, and what non-resident businesses must do to stay compliant.

Jennifer Dunn
07 May 2026
Regional Guides

West Virginia Sales Tax: Rates, Rules & Compliance Guide

Learn West Virginia's 6% sales tax rate, what's taxable (SaaS, digital goods, TPP), nexus thresholds, how to register, file, and remit as a remote or in-state seller.

Jennifer Dunn
06 May 2026
Regional Guides

California sales tax

Learn California sales tax rates, exemptions, and compliance rules. Understand the 7.25% base rate, local district taxes, and what items are tax-exempt.

Jennifer Dunn
06 May 2026
Regional Guides

Chicago Sales Tax Guide for SaaS & Digital Goods

Discover how Chicago sales tax affects SaaS. Get clarity on PPLTT, Amusement Tax, nexus thresholds, IL registration, and compliance tips.

Jennifer Dunn
06 May 2026
Regional Guides

Spain SII: Complete Guide to Real-Time VAT Reporting

Learn all about Spain's SII (Suministro Inmediato de Información) VAT reporting system—compliance, 4-day deadlines, submission requirements, and benefits.

Jennifer Dunn
29 Apr 2026
Regional Guides
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End-to-end compliance automation for sales tax, VAT, and GST. 100+ regions. One platform. Built by 50 people who believe the compliance cost of every transaction should be zero.

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