Know your numbers, Scale your store.

We specialize in tax, accounting, and financial strategy for Amazon, Shopify, and multi-channel online sellers.

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No confusion. No stress. Just smarter ecommerce finances.

We understand how overwhelming bookkeeping, taxes, and compliance can be for online sellers. That’s why we’ve built an accounting service designed specifically for Amazon, Shopify, and multichannel businesses—simple, strategic, and seller-focused.

01.

Ecommerce sellers struggling with messy books and tax deadlines

02.

Amazon & Shopify store owners needing expert CPA guidance

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Growing online businesses ready to scale with financial clarity

Expert services. Customize for online sellers. Backed by real CPAs.

Accounting & Advisory

Stay financially sharp with expert bookkeeping, reconciliations, QuickBooks setups, and custom reports—all optimized for Amazon, Shopify, and multi-channel sellers.

Sales & Income Tax

From multi-state sales tax filings to year-end income tax returns, we handle the heavy lifting—backed by software like TaxJar and backed by experienced professionals.

Strategic Consulting

From entity structuring to business valuations and outsourced controller services, we help ecommerce sellers grow smarter—with clarity, strategy, and structure.

We Set You Up. We Keep You Compliant. We Help You Grow.

Our step-by-step process is designed to simplify accounting for online sellers—while giving you powerful insights to make smarter decisions.

01.

Setup & Create

Optimizing your QuickBooks Online file

We start by creating or optimizing your QuickBooks Online file, connecting it to your bank accounts, merchant services, and all relevant sales channels.

  • Don't have QuickBooks yet? We’ll set it up for you.
  • Already using it? We'll perform a full tune-up to reconcile your accounts and clean up your books.

Next, we connect all your essential platforms and tools:

  • Sales channels: Amazon, Shopify, Walmart, eBay, and more
  • Marketplace data via A2X or Commerce-Sync
  • Sales tax tracking through TaxJar
  • Inventory systems like OrderHive, InventoryLab, etc.

02.

Integrate Everything

03.

Connect Your Financial Stack

We set up supporting apps to automate payables, receivables, payroll, and collaboration.

  • Accounts payable/receivable via Bill.com
  • Payroll setup with ADP
  • Access to a secure client portal

Once set up, we handle your books and provide ongoing insights.

  • Accurate monthly financial reports (P&L, Balance Sheet)
  • Detailed performance analysis tailored to your business
  • Monthly CPA consultations included
  • Sales tax filing and compliance

04.

Monthly Bookkeeping & CPA Support

Grow With Confidence

You focus on scaling your store—we’ll handle the numbers. With your books clean and compliant, you’ll have the visibility you need to make confident business decisions.

Run your business on one smart platform — with full control.

At Online Seller CPA, we help you move beyond spreadsheets. By integrating powerful apps with QuickBooks Online, you can manage accounting, inventory, HR, payroll, and marketplace sales from a single source of truth.

Welcome to modern accounting: automated, connected, and built for e-commerce. Gain back your time, reduce errors, and turn your financial data into real business insight.

Save Time

Automate everything from transaction entry to performance reports.

Improve Accuracy

Minimize human error with real-time, synced financial data.

Gain Control

Get full visibility into your business finances — anytime, anywhere.

Unlock Insights

Access essential analytics and KPIs to drive smarter decisions.

Boost Profitability

Cut inefficiencies, improve margins, and strengthen your competitive edge.

Digital Accounting transformation for E-commerce sellers

Start budgeting, saving, and building wealth today. The online seller CPA is free to try—no credit card required.