How to Use Checkpoint for Tax Knowledge Enhancement

Learn how to access and navigate Thomson Reuters Checkpoint to research tax positions, explore deskbooks, and enrich your technical tax knowledge.

May 18, 2026 By Corban Rogers

This guide demonstrates how to log in and navigate Thomson Reuters Checkpoint to enrich your tax knowledge. It provides a structured approach to utilizing deskbooks, researching specific topics like Net Operating Losses (NOLs), and researching for tax positions.

This guide is intended for accounting professionals and tax staff looking to improve their technical tax knowledge during off-peak periods, or when seeking detailed tax research beyond what standard search engines provide.

Log in to Checkpoint

Step #1: Navigate to checkpoint.riag.com in your web browser. — Navigate to `checkpoint.riag.com` in your web browser.

Step #2: Enter this username and click PROCEED WITH LOGIN. — Enter this username and click **PROCEED WITH LOGIN**.

Step #3: Enter my email address and click Sign in. — Enter my email address and click **Sign in**.

Step #4: Enter this password and click Sign In. — Enter this password and click **Sign In**.

Browse deskbooks and topics

Once logged in, you can access detailed tax resources directly from the dashboard. Focus on areas where you want to build a better general understanding or where you need to clarify something you encountered during busy season.

Pace yourself when reviewing these materials. Trying to read too much in a single sitting will lead to information overload and reduce your retention.

Step #5: Scroll down to the Quick Links section and click Browse: 1120 Deskbook to view resources categorized by return type. — Scroll down to the Quick Links section and click **Browse: 1120 Deskbook** to view resources categorized by return type.

The deskbook features a comprehensive index. For example, if you want to learn more about Net Operating Losses (NOLs), you can dive straight into that chapter.

Step #6: Click the + next to NOLs to expand the section and browse key issues and illustrations. — Click the + next to **NOLs** to expand the section and browse key issues and illustrations.

Step #7: Click Table of Contents at the top to navigate back to the main topic index. — Click **Table of Contents** at the top to navigate back to the main topic index.

Step #8: Click the + next to News Library to access recent tax updates and articles. — Click the + next to **News Library** to access recent tax updates and articles.

FAQ

Q: When should I use Checkpoint instead of Google or AI search tools?

A: Use Checkpoint when standard search engines or AI tools fail to provide enough depth, or when you need official tax cases to support a specific position on a return.

Glossary

Term	Definition
1120 Deskbook	A comprehensive tax research guide organized by corporate tax return (Form 1120) components.
Checkpoint	A professional tax research and compliance database created by Thomson Reuters.
NOL	Net Operating Loss, which occurs when a company's allowable tax deductions exceed its taxable income.

Browse deskbooks and topics

Pace yourself when reviewing these materials. Trying to read too much in a single sitting will lead to information overload and reduce your retention.

The deskbook features a comprehensive index. For example, if you want to learn more about Net Operating Losses (NOLs), you can dive straight into that chapter.

Glossary

Term

Definition

1120 Deskbook

A comprehensive tax research guide organized by corporate tax return (Form 1120) components.

Checkpoint

A professional tax research and compliance database created by Thomson Reuters.

NOL

Net Operating Loss, which occurs when a company's allowable tax deductions exceed its taxable income.