Onell.
Library · 29 free PDF guides

Everything you need to know to build in the US — in guides you can read in 10 minutes.

Written by a CPA who is also an IRS Tax Preparer and a Florida Notary — not by a marketing blog. Pick yours, leave your email, get it instantly.

📖 The 10 guides below are fully in English. The complete 29-guide library is available in Spanish. Need personal help? book a 15-minute consultation (USD 29, credited toward any service).
In English

The essentials

The guides our clients ask for most — LLC setup, compliance and banking. All 10 in English.

Checklist: opening a US LLC as a non-resident

The full formation path, step by verifiable step: state, registered agent, articles, EIN — and everything in between.

Your LLC's annual calendar

The exact dates that trigger penalties if you miss them — Form 5472, annual reports, registered agent — on one page.

Business banking without traveling: passing KYC

What Mercury, Wise and Relay actually check before approving you, and the consistency checklist that gets you through.

BOI 2026: who is exempt now

The interim rule flipped the obligation — find out which group you're in and who to stop paying.

ITIN, step by step

When you actually need one (and when you don't), the W-7 without the classic traps, and how to keep your passport.

The $99 LLC rescue guide

Bought a bargain LLC? The 9-question diagnostic to find out what's missing and how to fix it — without paying twice.

RON + apostille: sign US documents from anywhere

How remote online notarization works, which documents it covers, and how the apostille makes your paper valid in 120+ countries.

The US estate tax foreigners discover too late

USD 60,000 of exemption vs the residents' millions: which assets count, and how it's planned while alive.

Buying US real estate from abroad

LLC or your own name, DSCR financing, the net-income election and FIRPTA: the 5 decisions before closing.

How a non-resident's LLC is taxed

When the US truly doesn't tax you, when it does, and the giant difference between "no tax due" and "nothing to file".

Looking for the full library — apostilles, royalties, Amazon & Stripe, succession planning and more? Browse all 29 guides on the Spanish page →

Does your case not fit in a PDF?

That's what the 15-minute consultation is for: review your situation with a CPA and leave with a concrete next step.

Book a $29 consultation →

The $29 is credited toward any service you hire afterwards.