Sound Familiar? These Are the Most Common Problems Amazon and Shopify Sellers Come to Us With.
I don’t know how much inventory I have and what’s it worth.
I’m not sure what my cost of goods sold (COGS) is or how to find out.
I don’t know if I’m doing my sales tax properly, and I need help.
I think I’m selling profitably, but I’m not sure, and I don’t have systems in place to find out.
I don’t know how to see which sales channel is most profitable.
I don’t know how to use my numbers to make actionable decisions.
The Thelonex Solution. We Take Your E-Commerce Finances From Chaotic to Clean — Every Single Month..
Most Amazon and Shopify sellers are running their finances on a broken QuickBooks setup, outdated spreadsheets, or nothing at all. Your Amazon payouts aren't mapping correctly. Your COGS is wrong. Your sales tax exposure is unknown. And your CPA is frustrated every year. We fix all of that — and keep it fixed, month after month.h.
Transaction Reconciliation
Every Amazon payout, Shopify settlement, PayPal transfer, and bank deposit — matched to the penny in QuickBooks every month. No more mystery deposits.
Channel & Payment Reconciliations
We reconcile Amazon Seller Central, Shopify Payments, Stripe, and PayPal separately — so you can see exactly which channel is making you money and which is costing you.
Accurate COGS Calculation
We calculate your true cost of goods sold per product and SKU — so your P&L shows real gross profit, not just revenue. This is the number that determines if your business is actually working.
Financial Reporting & Insights
Clean P&L, Balance Sheet, and cash flow statement delivered by the 5th of every month. Formatted for your CPA, your bank, or your own decision-making.
Bookkeeping Rescue
3 months behind? 2 years behind? We’ve seen it all. We reconstruct your full transaction history in QuickBooks — accurately — and deliver a tax-ready package your accountant can actually use.
Your Complete E-Commerce Accounting Solution — Under One Roof
Stop juggling multiple vendors for bookkeeping, tax prep, and financial reporting. Our QuickBooks-certified team handles everything — from Amazon and Shopify integrations to A2X reconciliation and sales tax filing — so you get accurate, streamlined financials in one place.
QuickBooks Setup
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Get your accounting system built right from day one — no rework, no confusion. -
QuickBooks Online account setup
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Chart of Accounts Optimization
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Bank & Sales Channel Connections
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Basic training session (QBO dashboard & reports)
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Monthly QuickBooks Bookkeeping
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Clean books delivered every month — so you always know where your business stands.
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Bookkeeping & Financial Reporting
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Quarterly compliance review
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Annual Financial Statements
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Sales tax compliance monitoring
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Catch-Up Bookkeeping
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From backlogged to tax-ready — in days, not months.
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Transactions Catch-Up & Cleanup
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Reconciliation, chart of accounts cleanup, simple reports
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Tax-Ready Deliverables
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Sales Tax Services
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Stay compliant across every US state and Canadian province — without lifting a finger.
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Multi-state nexus evaluation (US)
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Economic nexus tracking (post-Wayfair)
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Canadian GST/HST & PST registration
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Provincial nexus compliance (Canada)
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Compliance requirement report
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Industries We Serve
We Work Exclusively With E-Commerce Sellers — No General Clients, No Divided Attention.
Whether you sell exclusively on Amazon, exclusively on Shopify, or across multiple channels, every process, report, and tax filing we deliver is built for how e-commerce businesses actually work.
Tools We're Certified In & Integrated With
QuickBooks Online ProAdvisor Certified · A2X integration specialists · TaxCloud for automated sales tax
Why Sellers Choose Thelonex
🏆 QuickBooks ProAdvisor Certified
- Our team holds active QuickBooks Online ProAdvisor certification — the standard required for professional QBO bookkeeping.
🇺🇸🇨🇦 US & Canada Specialists
We serve Amazon FBA and Shopify sellers across all 50 US states and every Canadian province. Post-Wayfair nexus, GST/HST, PST — we know it all.
💰 30–50% Below US Firm Rates
Our Pakistan-based team delivers the same QuickBooks-certified quality at rates starting at $199/month — without compromising on expertise or responsiveness.
📅 Month-End Guarantee
Your P&L, Balance Sheet, and reconciliation report are delivered by the 5th working day of every month. No chasing. No delays.
Thelonex vs. a General Bookkeeper — What’s the Difference?
| General Bookkeeper | Thelonex | |
|---|---|---|
| Amazon payout mapping | ❌ Manual or wrong | ✅ A2X-automated, accurate |
| COGS tracking | ❌ Estimates or ignored | ✅ Per-SKU, reconciled monthly |
| Sales tax — US | ❌ Basic 1-state | ✅ All 50 states, post-Wayfair |
| Canadian GST/HST | ❌ Usually not covered | ✅ Full CRA compliance |
| QuickBooks for e-commerce | ❌ Generic setup | ✅ E-commerce chart of accounts |
| Pricing | $500–$900/month typical | ✅ From $199/month |
| Dedicated account manager | ❌ Shared teams | ✅ One person, knows your store |
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 🇺🇸
Your Books Deserve Better Than a Generalist Accountant Who Doesn't Understand E-Commerce.
In 30 minutes, we'll tell you exactly what's wrong with your current setup, what your US sales tax exposure looks like, and what it would cost to fix everything. No obligation. No sales pressure. Just straight answers.
FAQs Frequently Asked Questions
Frequently Asked Questions About Our Services
We specialize exclusively in e-commerce — specifically Amazon FBA and Shopify sellers in the US and Canada. We use A2X to map your marketplace settlements correctly into QuickBooks, track COGS per SKU, and handle both US sales tax (all 50 states) and Canadian GST/HST. A general bookkeeper typically does none of this correctly.
No. QuickBooks Online setup is included in all our monthly plans. If you have QBO already but it's misconfigured, we'll audit and rebuild it as part of onboarding.
Onboarding typically takes 2–3 business days. We'll access your QBO, Amazon Seller Central, and Shopify, complete the setup, and deliver your first month-end report on schedule.
Yes. We handle Canadian GST/HST registration and filings with the CRA, provincial tax compliance (BC PST, QC QST, MB RST, SK PST), and configure QuickBooks for Canadian entities. If you sell in both the US and Canada, we manage both simultaneously.
A 30-minute call where we review your current bookkeeping setup, assess your sales tax exposure across US states and Canadian provinces, and give you a fixed-price quote. No commitment required.
Explore common queries about working with Thelonex. Still unsure?
Contact us
— we’re happy to help.