Sales Tax Services for U.S. CPA Firms

Accurate sales tax calculations, clean filings, and on-time payments—delivered by an offshore team that fits your workflow and helps you stay compliant across jurisdictions.

63+ U.S. CPA firms
160+ offshore experts
98% retention
Roles & Responsibilities

what we handle vs what your team controls

This keeps control where it belongs, while removing execution bottlenecks.

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What our offshore team handles

  • Sales tax calculation support based on location, product types, exemptions, and your process

  • Return preparation and filing support (state portals and required schedules as per your workflow)

  • Liability tracking and payment-ready summaries for timely remittance

  • Sales tax reconciliation aligned to accounting records (sales, tax collected, liability accounts)

  • Exemption certificate organization and documentation support

  • Multi-state filing trackers, calendars, and status reporting

  • Notice support packs (document pull, summaries, draft inputs for your review)

What stays with your firm

  • Client communication and advisory conversations

  • Final nexus determinations, registrations strategy, and sign-off

  • Reviewer decisions on positions, exceptions, and material judgments

  • Engagement scope, pricing, and relationship management

Process

How the work flows

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Step 1
Scope and standards alignment

We confirm filing states, frequency, revenue channels, product taxability rules, exemptions, and your review standards.

Step 2
Secure access and setup

We set up role-based access, trackers, calendars, and a clean documentation structure.

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Step 3
Calculation and return preparation

We prepare calculation workpapers, draft returns, and build a clear support pack for reviewer sign-off.

Step 4
Reviewer feedback loop

We turn comments quickly, keep change logs clear, and maintain version control.

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Step 5
Filing, payment support, and reconciliation

We support portal filing, payment-ready summaries, and reconcile results back to accounting records.

What We Provide

What’s included in our sales tax services

Sales tax calculation

  • Tailored sales tax calculations considering location, product types, and exemptions

  • Clear workpapers that show how the number was derived

  • Exception lists for reviewer attention (rate changes, unclear taxability, missing exemptions)

Sales tax return filing (corrected)

  • Return preparation support by state and filing frequency

  • Portal-ready schedules and reviewer-ready support packs

  • Documentation of inputs, adjustments, and filing confirmations

  • Clean trackers so your team knows what is filed, pending, or blocked

Sales tax liability payment support

  • Payment-ready liability summaries by jurisdiction and period

  • Guided support for timely remittance using streamlined online payment steps

  • Confirmation capture and documentation for the file trail

Sales tax reconciliation

  • Regular reconciliations aligning sales tax data with accounting records

  • Tie-outs for tax collected vs tax payable vs payments made

  • Proactive discrepancy spotting to reduce notice and audit risk

Why Choose Us

Why CPA firms choose us for sales tax compliance

cleaner documentation
Cleaner documentation, fewer notices

Accurate workpapers, confirmations, and reconciliations reduce the usual back-and-forth.

timely execution
Built for recurring compliance

Sales tax works best as a system: calendar, process, file trail, and consistent execution.

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Multi-state execution without chaos

We track filings across states and periods so nothing falls through gaps.

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Secure delivery model

We operate with controls designed for CPA firm expectations and sensitive client data.

sales tax compliance
Security Compliance

Data security and confidentiality

Sales tax data includes sensitive revenue and payment information, so security is built into how we operate. We follow secure access principles, controlled data handling, and process discipline aligned to CPA firm expectations.

SOC 2 logo
SOC 2
Applied
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ISO 27001
Certified
GDPR
GDPR
Applied

(If you want, we can share our security overview during the fit call.)

Testimonial

Hear from satisfied clients

“Madras Accountancy has been more than just a partner… they’ve seamlessly supported us in both tax and bookkeeping… Balaji and his team truly care about our success.”
Jonathan McCormick, EA, MST
Co-Founder & COO, Hillhurst Tax Group
“Their team’s expertise in both tax preparation and bookkeeping has brought consistency and reliability… proactive approach… completed on time with a high level of accuracy.
Josh T. Hansen, CPA
Founder & Managing Partner
“They quickly became our primary offshore provider… at preparatory and detail review levels, their staff are excellent… proactive communication and unwavering commitment.”
Dave Myers
COO, RS&F
“Their team’s expertise in tax preparation and review… significantly enhanced our efficiency during peak seasons.
Prasanna G. Kidambi, CPA, MBA
Tax Partner, Stowe & Degon
Let’s Start Working

What happens next

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Free 30 min fit call

We’ll review your clients’ filing footprint, data sources, tools, and where the bottlenecks are.

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Clear scope and workflow plan

You get a breakdown of what we handle vs what stays with your firm, plus a filing calendar and documentation approach.

Start with a small pilot and scale icon
Start with a small pilot and scale

We start with a defined set of states or client group, then expand once the workflow is stable.

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+1 (818) 491-6518
|
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info@madrasaccountancy.com
Book a free 30-minute fit call
Got Any Doubts?

Frequently Asked Questions

Do you handle multi-state sales tax filings?

Yes. We support multi-state return preparation, filing trackers, and reconciliations. Your firm retains final nexus and registration decisions.

Can you help with notices and audit prep?

Yes. We prepare notice response packs and audit support documentation for your team to finalize.

Do you support exemptions and product taxability workpapers?

Yes. We organize exemption documentation and maintain workpapers that make review easier.

How do you handle data security?

We operate with a security program aligned to CPA firm expectations, supported by SOC 2 (applied), ISO 27001 (certified), and GDPR (applied) controls.

BDO Alliance USA is among the industry’s largest associations of accounting and professional service firms. With more than 800 independent Alliance firm locations, the Alliance represents nearly every state and includes a comprehensive range of services.

BDO alliance USA

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