E-Commerce & Amazon Seller Services
Selling online creates compliance obligations across platforms and states. From sales tax nexus to multi-channel bookkeeping and cross-border sourcing, we provide the bookkeeping, sales tax, and tax return work behind an e-commerce business.
Sending a request is free and carries no commitment. Scope and fee are confirmed in writing.
In short: We handle accounting and tax for e-commerce and Amazon sellers: sales tax nexus analysis, multi-state registrations, marketplace bookkeeping, and business tax returns. It is for online sellers on Amazon, Shopify, and other channels who want one firm managing both their sales tax exposure and their federal income tax compliance.
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What's Included
- Marketplace and multi-channel bookkeeping
- Sales-tax nexus review and filings where you have obligations
- The business income tax return
Timing: Scope and timing are confirmed in writing before an engagement begins.
Not included:
- Sales-tax registration in each new state (billed separately)
- A standalone nexus study (separate)
- Foreign-owned entity Form 5472 unless added
Financial Compliance Built for Online Sellers
E-commerce businesses face a unique set of financial challenges. Revenue flows through multiple platforms, each with its own fee structure and reporting format. Sales tax obligations shift as your customer base grows and your inventory moves between fulfillment centers. Cost of goods sold calculations require tracking inventory across suppliers, warehouses, and returns.
Without a structured approach to these challenges, online sellers often find themselves with inaccurate financial records, unregistered sales tax obligations, and tax returns that do not reflect the true profitability of their business. Correcting these issues after the fact usually costs more than managing them as you go.
Our e-commerce services are designed to address these specific challenges. We integrate data from your sales platforms, manage your sales tax compliance across all states where you have nexus, and maintain bookkeeping that gives you a clear picture of your actual margins and profitability.
Platforms We Support
- Amazon (FBA and Merchant Fulfilled)
- Shopify and Shopify Plus
- eBay
- Walmart Marketplace
- Etsy
- WooCommerce
- BigCommerce
- Custom e-commerce platforms
Sales Tax Compliance for Online Sellers
The Supreme Court's 2018 Wayfair decision fundamentally changed sales tax obligations for online sellers. If you sell to customers in multiple states, nexus may exist in more states than expected.
Nexus Analysis
$500
We analyze your sales data, FBA warehouse locations, and business activities to determine every state where you have sales tax nexus. The analysis includes a detailed report of your obligations and a prioritized registration plan.
Registration
$150/state
We handle the sales tax permit registration process in each state where you have nexus. This includes completing the application, obtaining your permit number, and setting up your filing schedule with each state.
Ongoing Filing
$150/state/filing
We prepare and file your sales tax returns on the required schedule (monthly, quarterly, or annually depending on the state). This includes reconciling marketplace-collected tax with your filing obligations.
The E-Commerce Shield
A monthly retainer for e-commerce businesses covering bookkeeping, sales tax filings, and the annual business return, with reporting on profitability across channels.
What Is Included
- Monthly bookkeeping with marketplace integration
- Multi-channel revenue reconciliation
- Cost of goods sold tracking
- Sales tax filing for up to 5 states
- Quarterly financial statements
- Annual business tax return
- Quarterly strategy calls
- Annual tax planning session
Monthly Retainer
$1,275/month
Annual Prepayment (10% savings)
$13,770/year
Save $1,530 annually
Amazon Seller Bookkeeping
Amazon sellers face unique bookkeeping challenges. Between FBA fees, storage costs, returns, reimbursements, and advertising spend, understanding your true profitability requires careful tracking of Amazon reports.
Revenue Reconciliation
We reconcile your Amazon settlement reports with your bank deposits so deposits tie back to sales, fees, and refunds. This includes tracking the difference between gross sales, Amazon fees, refunds, and net deposits.
Fee Analysis
Amazon charges dozens of different fees, from referral fees and FBA fulfillment fees to storage fees and advertising costs. We categorize and track every fee so you understand exactly where your money is going.
COGS Tracking
Accurate cost of goods sold is essential for understanding your margins. We track inventory costs from purchase through sale, including landed costs for imported goods, and calculate your true per-unit profitability.
Reimbursement Tracking
Amazon may owe sellers reimbursements for lost, damaged, and destroyed inventory. We track your reimbursement claims and record them properly in your books.
Foreign-Owned U.S. LLCs on Amazon
Many overseas founders open a U.S. LLC to sell on Amazon, and the compliance side is easy to overlook at setup. A foreign-owned single-member LLC is usually a disregarded entity that must file Form 5472 with a pro-forma Form 1120 every year it has a reportable transaction, even with no U.S. income. The penalty for filing it late is $25,000 per form, so it is worth handling on time.
Form 5472 + 1120
The information return a foreign-owned single-member U.S. LLC owes for each year it has a reportable transaction. We prepare it and track your filing calendar so the due date is on record. Standalone preparation is $1,800.
Sales Tax From FBA Inventory
Storing inventory in U.S. FBA warehouses can create physical nexus regardless of where you live. We run the nexus analysis and handle registrations and filings in the states where you have obligations.
ETBUS & Effectively Connected Income
Whether your selling activity is effectively connected to a U.S. trade or business changes what you owe. We look at your facts and explain the position plainly before anything is filed.
One Membership, One Relationship
Books, sales tax, and the annual foreign-owned filings sit with one firm instead of scattered across a formation platform and a spreadsheet. Your records stay yours and move with you if you ever leave.
Cross-Border E-Commerce Compliance
If you sell internationally or source products from overseas, your compliance obligations extend beyond domestic sales tax. We coordinate with our international tax practice so these obligations are handled together.
Import Duties & Customs
Proper classification and documentation of imported goods, including landed cost calculations for accurate COGS.
International Entity Structure
Guidance on entity structure for sellers with operations in multiple countries, including transfer pricing considerations.
VAT & GST Compliance
Coordination with international tax advisors for VAT/GST obligations in countries where you sell directly to consumers.
Arc & Ledger is an accounting and tax advisory firm. We are not a law firm and do not provide legal advice. For all legal matters including operating agreements, liability protection, intellectual property, and immigration, we recommend consulting a licensed attorney.
How every engagement is checked
Every engagement runs through the same written procedure. It is the reason the fee is what it is, and you can hold us to it.
- 1Scope and fee in writing before any work begins.
- 2Documents arrive through the secure client portal, not as email attachments.
- 3A second review on a different day, against a written checklist, before anything is filed.
- 4If the IRS writes about a return we prepared, reviewing the notice with you is free. Any response or representation beyond that review is quoted in writing first.
Frequently Asked Questions
Common questions about this service area.
Related Guides
Learn more about this topic with our in-depth guides.
Do Non-US Sellers Owe US Tax?
Income tax, Form 5472, and sales tax nexus for non-resident Amazon and e-commerce sellers.
Read GuideLLC vs. S-Corp Comparison
Compare entity structures to find the tax setup that fits your e-commerce business.
Read GuideU.S. Tax Compliance Guide
Compliance information for online sellers including sales tax, Form 5472, and ETBUS rules.
Read GuideRelated Services
Explore other ways we support our clients.
Business Tax & Compliance
Annual business tax return preparation for your e-commerce entity, including entity selection guidance.
Learn MoreBookkeeping & Monthly Accounting
Standalone bookkeeping services if you need financial record management outside the E-Commerce Shield.
Learn MoreCross-Border & International Tax
International compliance for e-commerce businesses with cross-border operations or foreign sourcing.
Learn MoreRequest an E-Commerce Review
Submit your information and we will assess your sales channels, nexus exposure, and recommend the right level of support for your online business.
Arc & Ledger takes on work selectively. Each request is reviewed for fit with our practice areas, and scope and timing are confirmed in writing before an engagement begins.
“Arc & Ledger provided exceptional service, making my tax preparation seamless and stress-free.”– Christian S., Google Review
A secure Client Portal invitation is sent only after Arc & Ledger accepts the engagement or you purchase an available fixed-scope service. A call, waitlist entry, or contact form alone does not create portal access.