Terms of Use

These Terms of Use ("Terms") constitute a legally binding agreement between you (whether individually or on behalf of an entity you represent, "User," "you," or "your") and Ohio Sales Tax Calculator (operated by CalcWorks Media LLC, "we," "us," or "our").

These Terms govern your access to and use of the public calculators at ohiosalestaxcalculator.com and the registered web application workspace ("Ohio Sales Tax Pro" or the "Platform"). By visiting the site, creating an account, signing in, uploading certificates, or utilizing platform features, you acknowledge that you have read, understood, and agree to be bound by these Terms. If you do not agree, you must immediately cease using the Service.

To access workspace features, including county rate change alerts, exemption certificate management, and UST-1 filing preparation, you must register an account using a valid work email address and password, magic link, or authorized Google account.

You agree to provide true, accurate, and complete information regarding your legal business or accounting firm, Ohio Vendor's License number, home county, and organizational roles (such as Business Owner, CFO/Controller, CPA/Accountant, or Operations Specialist).

You are solely responsible for safeguarding your login credentials, managing role-based access for team members or client accounts, and for all activities that occur under your workspace. You must notify us immediately of any unauthorized access or security breach.

The Platform provides a secure Certificate Vault enabling vendors and accounting professionals to upload, store, inspect, and organize sales and use tax exemption certificates. This includes Ohio Department of Taxation Forms STEC-B (Sales and Use Tax Unit Exemption Certificate), STEC-U (Sales and Use Tax Blanket Exemption Certificate), STEC-CO, Streamlined Sales Tax (SST) certificates, and out-of-state resale documentation.

In connection with certificate storage and transaction review, you and your authorized users may upload digital documents containing sensitive customer business information and Tax Identification Numbers, including Federal Employer Identification Numbers (FEIN/EIN), Ohio Vendor's License numbers, state sales tax registration IDs, and customer signatory details.

By uploading, storing, or managing exemption certificates or customer tax IDs in the Platform, you expressly represent, warrant, and certify that:

• You possess all lawful authority, required consents, and commercial permissions under applicable state and federal law to collect, record, store, and process purchaser exemption certificates and customer tax identification numbers.

• All uploaded certificate documents are authentic, unaltered copies executed by authorized representatives of the purchasing entities in accordance with Ohio Revised Code (R.C.) § 5739.03 and Ohio Administrative Code (O.A.C.) 5703-9-03.

• You maintain independent responsibility for verifying that claimed exemption statutory grounds (such as resale, manufacturing, farming, or charitable status) legally apply to each specific transaction.

You acknowledge that the Platform's certificate storage, expiration alerts, and audit readiness evaluations are software organizational tools. Storing an exemption certificate in the Platform does not constitute an official determination, legal certification, or audit endorsement by the Ohio Department of Taxation. You remain solely responsible for demonstrating exemption validity during any state tax audit or administrative review.

Ohio Sales Tax Calculator provides calculation software, statutory rate monitoring, and filing preparation worksheets to assist Ohio vendors and accounting professionals. We are not a Certified Public Accounting (CPA) firm, law firm, or registered tax filing agency.

The calculations, county permissive splits, transit authority allocations, and UST-1 schedules generated by our tools do not constitute legal, tax, financial, or certified accounting advice. No attorney-client or CPA-client fiduciary relationship is created through your use of the Service.

You and your licensed tax advisors retain sole and absolute responsibility for reviewing all figures, ensuring compliance with Ohio Department of Taxation statutory guidelines, and timely submitting all monthly, semiannual, or quarterly returns and remittances through the Ohio Business Gateway (OBG).

Calculation of the prompt payment discount (0.75% discount up to a maximum statutory cap of $750 under R.C. 5739.12) is provided for informational planning only. Realization of this discount requires that you timely file and remit payment in full to the State of Ohio on or before the statutory due date.

To provide high-availability infrastructure, secure storage, and real-time alerts, the Platform integrates with trusted third-party cloud infrastructure providers ('Subprocessors'). You authorize us to transmit, store, and process your account information, certificate files, and tax records through the following designated service providers:

• Supabase Inc.: Relational database hosting, user authentication sessions, and encrypted cloud object storage for exemption certificate files, guarded by PostgreSQL Row-Level Security (RLS) tenant isolation.

• Resend, Inc.: Transactional email delivery infrastructure for sending statutory rate change notices, filing countdown alerts, verification OTP codes, and password recovery emails.

• Cloudflare, Inc.: Edge network security, DDoS prevention, and Cloudflare Turnstile automated anti-bot verification challenges.

• Vercel Inc.: Application hosting, edge network routing, and serverless compute execution.

• PostHog, Inc.: Workspace telemetry and performance monitoring with strict personal data minimization and IP address masking.

• Intuit QuickBooks & Square (Optional): If you connect third-party point-of-sale or accounting software, gross and exempt sales totals are imported strictly to calculate county sales allocations and UST-1 worksheets.

We enter into data processing agreements with our subprocessors requiring that they maintain rigorous technical and organizational safeguards to protect your data against unauthorized access or disclosure.

You retain 100% full ownership, rights, and title to all business data, customer records, tax identification numbers, and exemption certificate files uploaded to your workspace ('User Data'). You grant us a limited, revocable, non-exclusive license solely to host, copy, process, and display User Data as necessary to operate the Platform for your benefit.

We strictly pledge that we do not sell, rent, lease, or monetize your certificate files, customer tax IDs, or sales figures to data brokers, advertisers, or third-party commercial entities.

All proprietary software code, rate calculation algorithms, database architectures, user interface designs, and text published by Ohio Sales Tax Calculator belong to CalcWorks Media LLC and are protected by United States copyright and intellectual property laws.

Public structured datasets published in CSV and JSON formats on our /data page are licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0) with required attribution.

In using the Platform, you agree not to:

• Upload fraudulent, forged, or unauthorized tax exemption certificates or fictitious tax identification numbers.

• Attempt to circumvent or breach tenant isolation boundaries, Row-Level Security policies, or access another user's or organization's certificates or records.

• Use bots, scrapers, or automated scripts to harvest non-public application data or overwhelm server infrastructure.

• Reverse engineer, decompile, or copy proprietary platform source code or calculation mechanisms.

• Use the Service for any unlawful, deceptive, or fraudulent tax evasion schemes in violation of Ohio or federal law.

The Platform and all tools are provided on an 'AS IS' and 'AS AVAILABLE' basis without warranties of any kind, whether express or implied, including warranties of merchantability, fitness for a particular purpose, or non-infringement.

While we reconcile rates directly against Ohio Department of Taxation schedules and The Finder datasets under R.C. 5739.02, statutory rates, transit boundaries, and local permissive taxes are subject to legislative amendment. We do not warrant that calculations will be error-free or uninterrupted.

To the maximum extent permitted by applicable law, in no event shall CalcWorks Media LLC, its officers, directors, employees, or subprocessors be liable for any indirect, incidental, punitive, or consequential damages, or for any state tax assessments, interest charges, penalties, or lost timely filing discounts arising from your use of or inability to use the Platform, even if advised of the possibility of such damages.

You agree to defend, indemnify, and hold harmless CalcWorks Media LLC, its affiliates, and their respective officers and agents from and against any third-party claims, liabilities, damages, or expenses (including reasonable attorneys' fees) arising out of or related to: (a) your breach of these Terms; (b) any fraudulent, inaccurate, or unauthorized exemption certificate or customer tax ID uploaded to your workspace; or (c) your violation of any statutory tax filing or remittance obligation under Ohio law.

You may terminate your workspace account at any time. Before terminating your account, you have the right to export your complete certificate archive (Audit Defense Pack) and historical compliance logs.

We reserve the right to suspend or terminate accounts that violate these Terms, engage in fraudulent certificate submissions, or attempt security breaches.

These Terms shall be governed by and construed in accordance with the laws of the State of Ohio, without giving effect to conflict of law principles. Any legal suit, action, or proceeding arising out of or related to these Terms or the Service shall be instituted exclusively in the state or federal courts located in Ohio.

For legal questions or notices regarding these Terms of Use, please reach out through our contact page at ohiosalestaxcalculator.com/contact or via email at legal@ohiosalestaxcalculator.com.