Exemption certificate management that checks what the customer buys, not only the form
Every exempt sale backed by a valid certificate, and misuse caught before the auditor.
See one case, screen by screen ↓Exemption certificate management is how a seller collects, validates and tracks the sales tax exemption and resale certificates behind its tax-free sales, so each one is backed by a valid certificate for that customer, state and invoice date. Exemption Certificate Management adds six agents that collect, read and check every certificate, compare each exemption with what the customer buys, hold unsupported orders and answer audit samples — the sales tax analyst decides every exception.
How to choose AI solutions for back-office and enterprise work →
Updated
A distributor that sells to resellers, manufacturers, farms, schools, hospitals and governments makes a large share of its sales without sales tax. Every one of those sales is taxable until the seller can show a valid exemption certificate for that customer, that ship-to state and that invoice date. Today the certificates sit in a shared drive or a bolt-on tool. Someone keys them into the ERP, looks the permit number up on one state website after another, tracks expiry in a spreadsheet and chases customers by e-mail, while orders ship exempt "for now".
The gaps surface when a state auditor picks a sample. Texas gives 90 days to produce what is missing, and old versions have been overwritten or sit in an acquired company's archive. The risk nobody checks is whether the exemption fits what the customer actually buys. A resale certificate used for shop tools the customer consumes passes every field check — but a seller that knows, or has reason to know, the items are not for resale cannot rely on it in good faith.
Estimated split for one analyst at a seller with thousands of exempt business customers, by hand and with the solution.
Six agents collect, read and verify every certificate, compare each exemption with what the customer buys, and hold unsupported orders; the analyst decides.
Kestrel & Vane Industrial Supply, the US distribution business of Kestrel & Vane Group, sells $612.4M a year tax-free to 6,240 exempt customers at 41,380 ship-to addresses in 44 states and DC. It is Wednesday 14 October 2026. Here is how the sales tax analyst works with the agents, screen by screen, in the working solution.
Greg's day opens as a conversation, not a queue. Exempt sales covered: 98.1%, $600.8M of $612.4M, up from 91.6% in March. Overnight the Use agent compared 6,240 customers' purchases with their exemptions, the Validator agent checked 1,846 permit numbers in 27 state registries and the Order agent released 12 orders as their certificates passed. Each agent's message carries a proposal and its sources.
“The agents checked every exempt sale overnight. 32 things need your decision today, the most important a customer using its resale certificate for tools it keeps.”
Bluewater Marine Supply LLC, account 100482 in Corpus Christi, holds Texas Form 01-339, signed by owner Wade Thibodeaux on 5 March 2024. Every field carries a stamp. On the right, its $285,140 of exempt Texas purchases in 12 months by item class: marine pumps and fittings, and rope, anchors and deck hardware fit resale; shop tools, abrasives and welding consumables, and PPE do not — $179,640, 63.0%, $14,820 of tax at 8.25%.
Bluewater's own credit application calls it a “parts counter and full-service repair yard”.
The stamp on the Texas taxpayer number opens the evidence: the Texas permit search for 3-20418-55730-6, looked up by the Validator agent at 06:12 that morning. Taxpayer Bluewater Marine Supply LLC, permit active, location 418 Laguna Shores Rd, first sales 03/2019. Every other stamp opens its source the same way.
“Name and location match the certificate and ship-to 01.”
The run is shown step by step: the Reader read 9 fields at 99% legibility, the Validator confirmed the permit, form, signature and date, the Use agent read 412 invoice lines — and the Validator checked the Use agent's finding against 34 TAC §3.285 and agreed, at 96%. Greg asks which lines went to the service yard. 107 of 118 tool lines, 91%, and every abrasives and PPE line went to ship-to 02 at 77 Packery Channel Rd, in ones and twos.
The Use agent reports whether purchases fit the exemption — never the customer's intent.
The agents propose charging tax on shop tools, abrasives and PPE for Bluewater's Texas ship-tos from now on and keeping the exemption on marine parts. Greg picks from five reason codes — U1 charge tax from now on, U2 charge and accrue, U3 ask the customer, U4 accept, or R1 the agent misread the purchases. He keeps U1, adds a note and signs.
“You decide; the reason code, your note and your e-signature go on the record.”
The Order agent writes the billing rule to SAP: item classes 41, 44 and 52 taxable for account 100482 at its Texas ship-tos. The Collector agent drafts a plain-words note to Wade Thibodeaux, sent only when Greg approves it. Under the certificate, Bluewater's other ship-to states: Florida expires Thu 31 Dec, Alabama expired Wed 30 Sep with order SO-4471906 held, Louisiana has none on file — requested Fri 9 Oct, reminder Fri 16 Oct.
“Your Texas resale certificate lets you buy tax-free the marine parts you resell from your store.”
Whether to accrue the $14,820 for October 2025 to September 2026 is not Greg's call or the agents'. It goes to Priya Raman with Greg's U1 decision attached; she signs U2, charge tax and accrue the past exposure, with her own e-signature. Since the certificate was signed, the same items come to $38,210 of tax.
Bluewater is one of five. Corbin & Vale Builders buys building materials on a resale certificate that contractors install, $19,460 a year. Halvorsen Fleet Services uses shop supplies servicing its own fleet customers' trucks, $12,780. Ironbark Machine Works buys janitorial and office supplies on a manufacturing certificate, $9,870. Meridian Charter Academy ships to a for-profit affiliate's address, $4,310.
Rule: a finding is raised at 25% of exempt purchases or $2,500 of tax a year.
Seven exempt orders, $148,260, would ship to a state where the customer has no valid certificate. The largest, SO-4472031 for Gulfline Fabrication at $41,600, is going to Louisiana on a number with two digits swapped: 2091437 is not in the registry, 2091473 is. The Order agent proposes releasing it exempt as soon as the customer confirms, and shipping the others with tax today, credited when the certificate passes.
Rule set by Priya Raman: hold exempt orders of $5,000 or more without a valid certificate; tax smaller ones and credit them later.
The state asked on Wed 2 Sep for certificates for 214 sampled exempt invoices from January 2022 to December 2025, due Tue 1 Dec. The Audit agent found 201 on day one; 207 are ready now, including 6 older versions and 3 from the Harbor & Lyle archive. Five are requested from customers. Two customers have closed, and it proposes conceding those lines — $1,186 of tax — for Priya to decide and sign.
The Audit agent never concedes a line and never sends anything to the state.
The same certificate, seen by five of the people who carry it — what their week looked like, and what it looks like now.
Six agents collect, read and verify every certificate, compare each exemption with what the customer buys, and hold unsupported orders; the analyst decides.
Asks for the right state's certificate the moment an order ships somewhere none is on file, ahead of every expiry and for every gap in an audit sample. Names the exact form, links a page pre-filled with what is known and reminds on day 7, 14 and 21.
Reads every certificate that arrives — portal, e-mail, fax or a photo from a sales rep — identifies the form among 40+ state forms, the Streamlined form and the multistate form, and maps it to the customer, ship-tos and states.
Checks every field, the form accepted in the state, signature, date and expiry, and each number in the state's registry — 27 online lookups. Re-checks the Reader's fields and the Use agent's findings against the state rule.
Reads 12 months of each exempt customer's invoice lines and judges by item class, quantity and ship-to address whether the purchases fit the reason claimed — resale, manufacturing, agriculture, non-profit, government — with the tax at stake.
Watches every exempt order in SAP. Holds or taxes it by rule when the ship-to state has no valid certificate, releases it when one passes, writes approved billing rules and proposes credits for tax charged in a gap.
Answers a state auditor's sample with the certificate valid on each invoice date, including superseded versions and acquired companies' archives. Explains each gap, has the Collector chase it, counts down the deadline and builds the audit pack.
Decides every exception; the tax manager approves accruals. The agents propose; a named person decides.
Ask in plain words, or tell the agents what to do. Answers cite the certificate, the registry, the invoice lines and the state rule; nothing changes until a person approves it.
Which of these went to the service yard?
91% of the tool lines — 107 of 118 — and every abrasives and PPE line went to ship-to 02, the service yard at 77 Packery Channel Rd, in ones and twos. The pumps, fittings and rope went to the store in case quantities.
What do we owe if we change nothing?
If an auditor finds it, the certificate does not protect these sales: we had reason to know. That is $14,820 for the last 12 months and $38,210 since March 2024, before interest. Whether to accrue it is Priya's decision; I can prepare it.
Are we ready for the Texas auditor?
207 of 214 sampled invoices have the certificate that was valid on the day; 5 are requested and 2 customers have closed ($1,186 of tax to concede). 48 days are left of the 90.
Which states are we weakest in?
Louisiana (95.1% of exempt sales covered) and Nevada (95.8%) — both have certificates in your inbox and orders on hold. Overall coverage is 98.1%, up from 91.6% in March.
13 screens from the working solution, on its sample data. Pick one to see it large.
What the agents may do on their own, and each state's forms and expiry, are settings. Changes are drafted and take effect when the tax manager approves them.
| Setting | Default | Choose from |
|---|---|---|
| File a certificate without a person | Every check passes, the registry confirms, the Reader is at least 95% sure | A confidence you set, approved by the tax manager |
| Re-check sample of filed certificates | 10%, picked at random for a person | A share you set |
| Raise a use finding | 25% of exempt purchases, or $2,500 of tax a year | A share you set |
| Hold exempt orders without a valid certificate | From $5,000; smaller orders are taxed and credited later | An amount you set |
| Texas | Form 01-339; valid while the permit is active, company refresh every 4 years | Checked in the Comptroller permit search · 6.25% + local |
| Florida | Annual Resale Certificate (DR-13); each calendar year, 31 Dec | Checked by certificate verification · 6% + surtax |
| California | CDTFA-230 (company rule); company refresh every 4 years | Checked by seller's permit verification · 7.25% + district |
| Requests and the audit clock | Reminders day 7, 14 and 21, a call on day 22; audit warnings at 30, 14 and 7 days | Set under Notifications and SLAs |
Every figure is labelled: a target the solution is built to, an estimate, a typical published result, or a proven one.
“demo” = seen in the working solution, on its sample data · “estimated” = our estimate · “typical” = published rules (Texas Tax Code §151.054 as amended by SB 296, 2021 — 90 days to produce certificates after an audit notice; Streamlined Sales and Use Tax Agreement §317 — 120 days; 34 TAC §3.285 and §3.287 on resale certificates and good faith). State forms, expiry periods and rates shown are the demo company's configured rules. Kestrel & Vane Group, its customers, orders and the people named on this page are fictional — characters and sample data in the working solution.
Exemption certificate management is how a seller collects, validates and tracks the sales tax exemption and resale certificates behind its tax-free sales, so each one is backed by a valid certificate for that customer, state and invoice date. Exemption Certificate Management adds six agents that collect, read and check every certificate, compare each exemption with what the customer buys, hold unsupported orders and answer audit samples — the sales tax analyst decides every exception.
The Reader agent reads every field, and the Validator agent checks the form accepted in the state, signature, date and expiry, and looks the number up in the state's own registry — 27 states have an online lookup; the rest are checked by format and a yearly letter. A certificate is filed without a person only when every check passes at 95% or more, and a random 10% is re-checked.
Yes. The Use agent compares 12 months of each customer's exempt invoice lines with the reason on its certificate, by item class, quantity and ship-to address, and shows the tax at stake. In the working solution it found a resale certificate covering shop tools the customer used in its own repair yard — $14,820 of tax a year. It reports a fit, never intent, and a person decides.
The Order agent holds exempt orders of $5,000 or more in SAP and taxes smaller ones, to be credited when the certificate passes. The Collector agent drafts a request for exactly that state's form, and the order is released once a valid certificate passes — never before.
The Audit agent takes the auditor's sample and finds the certificate valid on each invoice date, including superseded versions and acquired companies' archives. It explains each gap, has the Collector chase it, counts down the deadline and builds the audit pack with an index and hashes. Conceding a line is the tax manager's signed decision.
Yes. Expiry follows each state's rule and your own refresh rule — Florida each calendar year, Texas while the permit is active — and the Collector asks 60, 30 and 7 days ahead. In the working solution 1,214 certificates expire in the next 90 days, 386 of them Florida annual certificates on 31 December.
Yes. The agents read, check, compare, draft and hold by rule. Only tax staff accept a certificate or change a billing rule, every exception is decided with a reason code and an e-signature, and accruals, concessions and rule changes need the tax manager. Nothing goes to a customer for the first time without approval.
The Agentic Solution Engine builds and deploys it from your requirements and documents — your state rules, your certificate backlog and a quarter of exempt sales — and it goes live once every quality gate has passed. A first-time setup imports and reads your existing certificates and tries the rules on last quarter before anything is held.
Every country tested, every field traced, the return ready months before the deadline.
1-min demoE-Invoicing ComplianceEvery invoice checked before it leaves, and every rejection fixed the same day.
1-min demoTransfer Pricing DocumentationEvery margin tested before the year closes, and every file ready inside 30 days.
1-min demoWe'll run Exemption Certificate Management on a sample of your own certificates and a quarter of your exempt sales.