# April 15 Is Behind You. Sales Tax Exposure Isn't.

Canonical: https://trykintsugi.com/blog/april-15-is-behind-you-sales-tax-exposure-isn-t
Published: 2026-04-29

Tax season is over, but sales tax liability keeps building. See what a post-April exposure review covers: nexus gaps, filing errors, and how to catch them.

Income tax and sales tax run on different calendars, rules, and risk
profiles. When the April deadline passes, accounting firms have a useful
window to review where clients may have sales tax exposure.

## What an exposure review covers

A meaningful review should look at:

- Nexus status and registration gaps.
- Product taxability across the jurisdictions where the client sells.
- Filing accuracy, including rates, jurisdictions, and exemptions.
- Current exemption certificates for tax-exempt customers.

Clients can cross a threshold, add a taxable product, or create physical
nexus through a remote employee while their attention is elsewhere.

## Why timing matters

Exposure compounds from the point an obligation begins, not when the gap is
discovered. Many states offer voluntary disclosure programs that can limit
lookback periods or reduce penalties when a business comes forward
proactively.

An after-tax-season review creates a current-state baseline while there is
still time to address registration gaps and filing errors before another
quarter of liability accumulates.

## How automation helps

The traditional review requires pulling transaction data, checking
thresholds, confirming registration, and reviewing product categories by
hand. Kintsugi can run exposure analyses across jurisdictions, monitor
thresholds in real time, and flag gaps for follow-up.

For firms offering recurring sales tax advisory, that automation makes
consistent delivery possible without turning every review into a manual
project.