Simplified QuickBooks Accounting for Shopify & Amazon Sellers
Catch-Up Bookkeeping
Backlogged Books? We'll Get You Caught Up
If your Amazon or Shopify books haven't been touched in months — or years — you're not alone. Most e-commerce sellers reach a point where the backlog feels impossible to tackle. That's exactly what we fix.
Thelonex provides catch-up bookkeeping for Amazon FBA and Shopify sellers in the United States and Canada. We work in QuickBooks Online to clean up your full transaction history, reconcile every account, and deliver tax-ready financials your CPA can actually use.
Whether you're 3 months or 3 years behind, we'll assess your backlog and give you a clear timeline and fixed price — no surprises.
Every month you wait adds more transactions to reconcile, increases your risk of missing sales tax filing deadlines, and raises the cost of the cleanup. If your CPA is already asking for your financials and you don't have them — the time to act is now. We'll move fast and keep you informed at every step.
What's Included in Our Catch-Up Service
From first assessment to final report, here's exactly what we handle:
Backlog Data Entry
We enter every missing transaction into QuickBooks Online — Amazon payouts, Shopify settlements, bank deposits, expenses, and fees — going back as far as needed.
Financial Cleanup
We correct miscategorized transactions, resolve duplicate entries, fix chart of accounts errors, and organize your books to match e-commerce accounting best practices.
Reconciliation
Bank accounts, credit cards, Amazon Seller Central, Shopify Payments, PayPal, and Stripe — all reconciled to the penny in QuickBooks Online. For Canadian sellers, we also reconcile CRA GST/HST remittance accounts and provincial tax ledgers.
Reporting
Once your books are clean, we deliver a full P&L, Balance Sheet, and cash flow summary — covering every period we've cleaned up.
Tax-Ready Deliverables
We deliver a complete CPA-ready package including: monthly P&L by period, Balance Sheet, sales tax liability summary by state (US) or province (Canada), GST/HST filing summary (Canadian entities), tax basis worksheets, and a reconciliation confirmation for every account. Your accountant can file directly from what we deliver.
Our 5-Step Catch-up Bookkeeping Process
Here's exactly how we bring your books back to life — transparently, systematically, and without disrupting your business:
- Initial Assessment: You share access to your QuickBooks Online (or tell us you don't have it set up). We review every account, assess the total transaction volume and backlog period, identify what's missing or miscategorized, and give you a fixed-price quote with a firm delivery timeline — usually within 24 hours of the call.
- Data Collection: We connect directly to your Amazon Seller Central, Shopify, bank accounts, and payment processors. For older transactions, we'll request statements in whatever format you have — CSV exports, PDF statements, or direct platform access. We handle the data gathering so you don't have to dig through years of files.
- Data Entry & Cleanup: Every missing transaction is entered into QuickBooks Online. Miscategorized entries are corrected. Duplicate transactions are removed. Chart of accounts is restructured for e-commerce if needed. This is where the bulk of the work happens — and we keep you updated throughout.
- Review & Reporting: Before final delivery, we run a full reconciliation check — every account balance is verified against source documents. We then deliver your complete financial package: P&L by period, Balance Sheet, cash flow summary, and all tax-ready schedules.
- Ongoing Support: Once your books are clean, we offer two paths: you take it from here with a documented summary of what was done, or you transition onto one of our monthly bookkeeping plans so it never gets messy again. We'll recommend the right plan based on your transaction volume.
Service Packages
Starter
$200 /Fixed Price
For small businesses with basic needs
What's Included
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Up to 500 transactions -
Up to 2 bank/credit card accounts
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Up to 3 months of backlog
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Basic reconciliation & chart of accounts cleanup
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Simple P&L and Balance Sheet reports
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30-day email support
Get a Free Assessment
Standard
$500 /Fixed Price
For growing businesses
What's Included
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Up to 1,500 transactions
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Up to 4 bank/credit card accounts
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Up to 12 months of backlog
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Full-year catch-up including sales tax adjustments
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Vendor/customer balance reconciliation
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60-day email support + 1 live review session
Get a Free Assessment
Premium
$1000 /Fixed Price
For sellers with complex multi-year backlogs
What's Included
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Up to 2,500 transactions
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5+ bank/credit card accounts
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12+ months / multi-year backlog
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Multi-year restoration with full reconciliation
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90-day priority support
Get a Free Assessment
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Why Choose Thelonex for Catch-Up Bookkeeping
What Makes Our Catch-Up Service Different
🔢 Fixed Price, Always
We quote your entire cleanup before starting — based on transaction volume and backlog period. No hourly billing, no scope creep. What we quote is what you pay.
Dedicated account managers for personalized service.
⚡ Fast Turnaround
A 3-month backlog typically takes 3–5 business days. A full-year cleanup takes 1–2 weeks. We work fast because we know tax season doesn't wait.
Dedicated account managers for personalized service.
🇺🇸🇨🇦 US & Canada Specialists
We handle US state sales tax adjustments and Canadian GST/HST reconciliation as part of the cleanup — not as an add-on. Your CPA gets a complete, compliant package for both jurisdictions.
Dedicated account managers for personalized service.
📦 E-Commerce Experts, Not Generalists
We don't clean up restaurant books or contractor invoices. We exclusively work with Amazon FBA and Shopify sellers — which means we know exactly how your payouts, fees, refunds, and COGS should be structured in QuickBooks.
Dedicated account managers for personalized service.
🏆 QuickBooks ProAdvisor Certified
Our team is QuickBooks Online ProAdvisor certified — the standard for professional QBO cleanup and restructuring.
🔒 Secure Access — You Stay in Control
We use accountant-level access in QuickBooks Online — we never request admin or payment access. You can revoke our access at any time with a single click.
📋 Full Documentation on Delivery
Every catch-up project comes with a written summary of what was cleaned up, what was corrected, and what your CPA needs to know — so there are no mysteries in your books going forward.
🔄 Seamless Transition to Monthly Bookkeeping
Once your books are clean, moving to our monthly bookkeeping service is instant — same team, same system, no re-onboarding.
What Our Clients Say About Thelonex
What Amazon and Shopify Sellers Say About Working With Thelonex
"I'd been avoiding my books for months because my inventory records were a complete mess in Shopify. Thelonex cleaned up 8 months of backlog in under a week and set everything up properly in QuickBooks. Night and day difference.
Marianne - Echoblu
Shopify Store Owner"Thanks to THELONEX, we went from reactive budgeting to real-time decision-making. Their insight helped us reduce costs and scale with confidence."
Terry Kane - Guild Design Gallery
Shopify Store Owner 🇨🇦Awesome work. Very professional and accommodating — worked around my ever-changing schedule. Great understanding of the process and exactly what I needed. Very patient even when I wasn't always prompt responding. Would not hesitate to work with Thelonex again.
David - Beyondepic
Amazon FBA Seller 🇨🇦"Thelonex transformed our messy financials into a streamlined system we can trust. Their team feels like an extension of our business."
Robert Cervantes
Amazon & Shopify Seller 🇺🇸Frequently Asked Questions
Got questions? We’ve got answers.
Yes. We provide catch-up bookkeeping for e-commerce sellers in Canada, including GST/HST reconciliation, provincial tax adjustments, and QuickBooks Online cleanup for Canadian entities. All deliverables are formatted for your Canadian accountant or tax preparer.
That's what our free assessment call is for. You share access to your QuickBooks (or tell us you don't have it set up yet), we review the scope of the backlog, and we give you a fixed-price quote with a clear timeline. No commitment required.
Catch-up bookkeeping involves updating your financial records to reflect all past transactions accurately, ensuring your books are complete and compliant.
The duration depends on the size and complexity of your backlog. After an initial assessment, we provide a clear timeline tailored to your needs.
We work exclusively in QuickBooks Online. If you're currently using another platform (Xero, Wave, FreshBooks), we'll migrate your data into QBO as part of the catch-up project at no extra charge. QBO is the industry standard for e-commerce bookkeeping and the only platform we recommend for Amazon and Shopify sellers.
Absolutely. We prepare your books to be tax-ready, making the filing process smooth and efficient while coordinating with your accountant.
We collaborate with you to gather missing information and reconstruct your financial history as accurately as possible, minimizing gaps and errors.
Our team follows strict reconciliation and verification processes to guarantee your financial data is accurate and reliable.
Our catch-up services start at $200 for up to 3 months of backlog (up to 500 transactions). A full-year cleanup starts at $500. Multi-year restorations start at $1,000. All prices are fixed — quoted before we start, so there are no surprises. View full pricing details above ↑
Yes, after catch-up, we can help set up ongoing bookkeeping processes to keep your records current and avoid future backlogs.
Yes, once your books are clean, we offer a seamless transition to our monthly bookkeeping service — starting at $199/month. You'll have the same team, the same QuickBooks setup, and monthly deliverables, so you never face a backlog again. We'll recommend the right plan for your transaction volume on your assessment call.
Yes, but only read-only or report-level access. We connect to your Amazon Seller Central data reports and Shopify transaction exports to reconstruct your transaction history accurately. We never request payment access or admin credentials. You can revoke access at any time.
Explore common queries about working with Thelonex. Still unsure?
Contact us
— we’re happy to help.
our Books Can Go From Chaotic to Clean — Faster Than You Think.
Whether you're 3 months behind or 3 years behind, we've cleaned up backlogs exactly like yours. We'll give you a fixed price, a firm timeline, and a tax-ready deliverable your CPA will actually thank you for. No hourly billing. No surprises. Just clean books.