Resources

Sales tax resources for merchants managing multi-state filings.

Use the AtomicTax resource library to understand nexus, registrations, filing calendars, state rules, report quality, and the operational details that make client sales tax work break down in the real world.

Start Here

Use the state guide, filing due dates, or accountant workspace depending on what problem you are solving.

Not every visit means the same intent. Some firms need state-specific guidance. Some need filing calendar context. Some need to understand whether AtomicTax can help organize client returns with a cleaner filing workflow.

Four resource lanes

State rules, registrations, due dates, and filing workflow content for merchants and operators.

State-by-state
Permits + nexus
Due dates
Filing packets
Guide Pillar

U.S. state-by-state sales tax guide.

Understand how nexus, registration, filing cadence, and state complexity change from one jurisdiction to the next.

Filing Packets Workflow

Client filing packets from source reports.

Useful when CSV, Excel, PDF, or sales reports need to become reviewable return packets.

Registration Workflow

Sales tax permit and state registration content.

Figure out what registration work exists before trying to force the filing process to behave.

Nexus Reference

Economic nexus threshold guides.

Understand where sales volume and state activity may already be creating obligations behind the scenes.

Filing Operations

Sales tax filing due dates and cadence.

Use this when the real issue is staying on top of recurring state due dates and filing cycles.

Blog Library

Browse the full AtomicTax blog.

See the preserved blog path structure rebuilt into the new static site with cleaner layout and internal linking.

State Guides

Start with the states that create the most workflow friction.

We're rebuilding the state library around practical client filing questions rather than generic tax summaries. These guides focus on what actually makes returns easier or harder to run.

California Guide

California permit, nexus, and filing workflow.

Use this when district complexity and higher sales volume are making California harder to operate cleanly.

Colorado Guide

Colorado permit, nexus, and filing workflow.

Useful when home-rule and local complexity are putting real pressure on your filing workflow.

Texas Guide

Texas sales tax permit and filing workflow.

Built for firms that need cleaner source-report readiness and recurring return control for client work.

Connecticut Guide

Connecticut permit, nexus, and filing workflow.

Useful for firms that want to maintain a cleaner recurring cadence once the state account is already active.

Georgia Guide

Georgia nexus, registration, and filing workflow.

Useful when a core Southeast filing state needs more stable review timing and cleaner report packaging.

Maryland Guide

Maryland nexus, registration, and filing workflow.

Useful when you need to tighten a recurring state process that should be routine but still feels manual.

Massachusetts Guide

Massachusetts nexus, registration, and filing workflow.

Useful for firms that need to keep a core filing state stable as the broader state map expands.

Nevada Guide

Nevada nexus, registration, and filing workflow.

Useful for firms that need a cleaner recurring process in a common filing state.

Ohio Guide

Ohio nexus, registration, and filing workflow.

Useful when you need a stronger recurring process in a state that should be manageable once the report and cadence are aligned.

Pennsylvania Guide

Pennsylvania nexus, registration, and filing workflow.

Useful for firms that need another reliable recurring state to stay stable as the broader state map expands.

Virginia Guide

Virginia nexus, registration, and filing workflow.

Useful when you want another predictable recurring state to stay clean through stronger source-report and review discipline.

Washington Guide

Washington nexus, registration, and filing workflow.

Useful when another large filing state needs stronger period control and a more repeatable review workflow.

Wisconsin Guide

Wisconsin nexus, registration, and filing workflow.

Useful for firms that want a recurring state to remain stable through cleaner report packaging and approval.

Oregon Guide

Oregon state workflow and no-statewide-sales-tax context.

Useful for making sure Oregon is documented clearly and not treated like a normal recurring filing state.