Author
Danilson Ramos
Founder, Atamatax
Founder of Atamatax. A software developer based in Monthey, Switzerland, who built a PFIC-first US expat tax tool after working through the Form 8621 problem the existing software skips. Writes the guides on this site; technical determinations are gated on independent professional review.
Role at Atamatax
Danilson designs and documents the product's PFIC-first workflow, maintains its public research registry, and writes the explanatory material that connects supported software inputs to the relevant forms and official instructions. His work is software engineering and technical documentation—not individual tax advice or a claim to be an enrolled agent, CPA, or attorney.
How articles are produced
Tax claims begin with primary authorities such as the Internal Revenue Code, Treasury regulations, IRS form instructions, FinCEN guidance, treaties, and published court decisions. Numeric facts are kept in a source-linked registry, and technical pages carry visible publication or update dates. The site's build checks block unknown citations and prevent an unverified professional credential or review stamp from being published.
You can inspect the calculation methodology and primary sources, accuracy and review boundaries before relying on any explanation.
Review boundary
A named professional review is shown only after a verified reviewer has completed it and supplied credentials that Atamatax can substantiate. Until then, articles identify the missing review plainly and link to their underlying authorities. Readers with a fact-specific position, election, late-filing question, or uncertain entity classification should ask an appropriately licensed US tax professional.
Corrections
Source, calculation, or wording corrections can be sent to support@atamatax.com. Include the page URL and the authority you believe changes the conclusion. Material changes are reflected in the methodology changelog.
Areas of focus
- PFIC
- Form 8621
- FBAR
- FATCA
- Swiss pillar 3a
- vested benefits