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E-commerce businesses face sales tax nexus obligations in dozens of states, complex inventory costing, multi-platform income reconciliation, and platform fee accounting. All requiring a CPA who understands online business models.
Detailed tax guides for each major platform, covering 1099 forms, deductions, and platform-specific rules.
Shopify is NOT a marketplace facilitator. 1099-K reconciliation, multi-state sales tax compliance, COGS, and entity planning.
Read GuideMerchant-of-record sales tax trap, zero inventory COGS under IRC 471(c), de minimis exemption suspended for all countries (EO 14324).
Read GuideIntegration model (Printful + Shopify) vs marketplace model (Redbubble). COGS vs royalty classification and sales tax.
Read GuideMulti-state nexus from 25-40+ states, 1099-K reconciliation, settlement report accounting, and COGS with landed cost.
Read GuideE-commerce has created a new category of tax complexity. Online sellers face economic nexus rules in 45+ states after South Dakota v. Wayfair (2018), multi-platform income reconciliation (Amazon, Shopify, eBay, Etsy), inventory cost accounting, and 1099-K filing thresholds that have shifted dramatically.
E-commerce sellers at every level, from solo Amazon FBA operators to multi-channel Shopify businesses with six-figure revenues, need to understand their sales tax obligations, account for inventory correctly, and minimize their tax liability through proper planning.
Monaco CPA covers e-commerce tax preparation, planning, and compliance for businesses selling physical products, digital downloads, or both.
Personal Review
Start with the contact form. Share the basics and expect a response within 1–2 business days with a clear next step.
Get StartedView PricingEconomic nexus analysis in states where you have triggered sales tax obligations
Multi-platform income reconciliation (Amazon, Shopify, eBay, Etsy, TikTok Shop)
1099-K reporting changes and gross receipt vs. net income confusion
Inventory cost accounting (FIFO, LIFO, weighted average)
Amazon FBA fee accounting and cost of goods sold calculation
NJ Sales Tax on digital products and software
Entity structure planning as revenue scales
Marketplace facilitator laws and platform-remitted sales tax tracking
Deducting platform fees, shipping costs, and advertising spend
Home-based business deductions (home office, storage space)
NJ 1099-K threshold: NJ requires reporting at $1,000 with no transaction minimum, significantly lower than the federal threshold of more than $20,000 and more than 200 transactions. E-commerce sellers on Amazon, Shopify, and eBay will receive NJ-specific 1099-Ks at much lower sales volumes
Tax preparation, planning, and compliance services tailored to your industry.
Schedule C, S-Corp, and LLC returns for online sellers, with proper COGS calculation, platform fee deductions, and inventory accounting.
Review of your sales volumes by state to identify where you have triggered economic nexus and need to register and collect sales tax.
Reconciliation of Amazon settlement reports, fee allocations, FBA inventory valuation, and reimbursement accounting.
FIFO, LIFO, and weighted average cost methods, and the tax implications of each for your business profile.
Estimated tax projections based on platform-reconciled net profit, avoiding the common Q4 surprise of a large year-end tax bill.
LLC vs. S-Corp analysis for e-commerce sellers as net income scales, including the NJ CBT implications.
Free Tool
No fixed income threshold decides the election. Use the free calculator to screen sole prop SE taxes vs. S-Corp payroll taxes, including NJ compliance costs - then model the full return before electing.
Screen Your S-Corp NumbersHave a different question about e-commerce tax or accounting? Send Greg a message - all inquiries are answered within 1-2 business days.
After the Supreme Court's 2018 ruling in South Dakota v. Wayfair, states can require out-of-state sellers to collect and remit sales tax based on economic activity alone (sales volume or transaction count), even without a physical presence. Most states have set thresholds of $100,000 in sales or 200 transactions per year. If you sell to customers across the country, you may have triggered nexus in 20+ states without realizing it.
For true marketplaces (Amazon, eBay, Etsy), marketplace-facilitator laws in most states generally require the platform to collect and remit tax on covered marketplace sales. Sales through a merchant's own Shopify storefront are different: the seller is the merchant of record. Shopify Tax can calculate the tax, but calculation alone does not file or remit it. Shopify can file and remit only if the seller separately uses Shopify Tax and sets up the optional automated-filing service for the applicable returns. The Shop sales channel has separate marketplace-facilitator treatment for covered U.S. orders. In all cases, you remain responsible for tracking nexus, registrations, and any sales or states the platform service does not cover.
Inventory is a cost of goods sold item, you deduct it when sold, not when purchased. The method you choose (FIFO, LIFO, or weighted average) affects both your taxable income and your balance sheet. LIFO can reduce taxable income in a rising-price environment but is not allowed under IFRS and requires IRS consent to change. Most small e-commerce sellers use FIFO or weighted average.
The OBBBA (Section 70432, signed July 4, 2025) permanently restored the federal 1099-K reporting threshold to more than $20,000 in gross payments AND more than 200 transactions, retroactively eliminating the ARPA $600 threshold. The 1099-K reports gross receipts - you still deduct all business expenses to arrive at taxable net income. NJ has its own $1,000 threshold with no transaction minimum.
Tax Planning
The OBBBA caps gambling loss deductions at 90% starting 2026. Break-even bettors now owe tax on "phantom income." Here's what NJ gamblers need to know.
Read GuideTax Planning
The best tax planning happens before December 31, not in April. Here are the strategies every NJ business owner should review.
Read GuideTax Planning
Self-employed NJ taxpayers must make quarterly estimated tax payments to both the IRS and NJ. Learn the 2026 due dates, safe harbor rules with worked dollar examples, and how to calculate payments to avoid underpayment penalties.
Read GuideWork with a NJ CPA
Start with the contact form. Greg will review your situation and reply with a clear next step.
Tax advice disclaimer: This material is for general educational information only and is not legal, tax, or accounting advice for your specific facts. A CPA-client relationship is formed only through a signed engagement letter.