Announcing our $21M Series A led by a16z. Read more.
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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
15 Jul 2026
SaaS

Illinois Sales Tax: Rates, Rules & Compliance Guide

Learn Illinois sales tax rates, local add-ons, exemptions, nexus rules, and the Chicago PPLTT for SaaS businesses. Covers combined rates, filing, remittance.

Jennifer Dunn
11 Jun 2026
Regional Guides

Texas Sales Tax: Rates, Rules & Compliance Guide

Learn Texas sales tax rates, what's taxable, economic nexus thresholds, registration steps, filing deadlines, and how to stay compliant.

Jennifer Dunn
11 Jun 2026
Regional Guides

Ohio Sales Tax: Rates, Rules & Compliance Guide

Learn Ohio sales tax rates, what's taxable, economic nexus thresholds, registration steps, filing deadlines, and how to stay compliant.

Jennifer Dunn
11 Jun 2026
Regional Guides

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
11 Jun 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
11 Jun 2026
Regional Guides

California Sales Tax: Rates, Exemptions & Rules

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
11 Jun 2026
Regional Guides

E-Invoicing In France: Everything You Need To Know

A practical guide to e-invoicing in France, including rollout dates, e-reporting, DGFiP, structured formats, compliance steps, and readiness tips.

Jennifer Dunn
11 Jun 2026
Regional Guides

Top 5 Sales Tax Compliance Companies Compared

Compare top sales tax compliance companies currently. Learn how to manage nexus, tax calculation, filing, and global indirect tax risk at scale.

Jennifer Dunn
11 Jun 2026
SaaS

Sales Tax Compliance Outsourcing Explained

Learn when sales tax compliance outsourcing makes sense and where automation delivers faster, more cost effective compliance across jurisdictions.

Jennifer Dunn
11 Jun 2026
SaaS

How Nexus Tax Software Helps You Stay Sales Tax Compliant

Nexus tax software gives SaaS companies real-time visibility into sales tax nexus, tax liability, and registration requirements across states.

Jennifer Dunn
11 Jun 2026
Tools

Top 7 International Tax Compliance Software Platforms

Stay compliant across multiple jurisdictions with international tax compliance software that streamlines indirect tax, e-invoicing, and global reporting.

Jennifer Dunn
11 Jun 2026
Tools
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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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