Tallyvane
Everything on Clear Self Tax — the calculation engine, the data files, the guides and this page — is written and maintained by one person, publishing under the name Tallyvane.
About the name
Tallyvane is a pen name. It is not a company, a team, or a stand-in for anyone else. The site does not claim an author it does not have, and it does not invent credentials: there is no CPA, enrolled agent or attorney behind these pages, and none is implied anywhere on them.
What I do and do not claim
I am a software developer. What I am good at here is reading a statute, a revenue procedure or a set of form instructions carefully, turning the rules into code that can be tested, and documenting where the two diverge. That is a documentary skill, not a professional one. I cannot tell you whether a rule applies to your situation, I do not give tax advice, and nothing on this site substitutes for a licensed professional or the official forms.
What the site offers instead is traceability. Every rate, threshold and credit comes from a dated file that names the document it was read from; the methodology page lists every rule the engine applies and every one it leaves out; the corrections log records the errors my own audits have found, including ones that were live on the site; and the editorial policy describes how a figure gets from a document into a calculator.
How the numbers are made
A data file reaches "verified" only after two independent reads of the primary documents produce the same figures. A third pass then tries to break the result, recomputing returns by hand from the agency's own worksheets and comparing them with the calculator line by line. That pass is where the real errors surface. It has caught, among others, a retirement-plan ceiling that was too high across one band of income, and a rounding order that left a breakdown a cent short of its own total. Both are in the corrections log with the rule that settled them. Confirmed figures become automated tests, and the site cannot be built while any test fails.
Language models help with the reading and the cross-checking; they decide nothing. Every published sentence and every figure is reconciled by me against the source document.
Professional review
The site has not been reviewed by a CPA, enrolled agent or tax attorney. When that changes, this page will name the reviewer, their credential, the scope of what they reviewed and the date, and it will say plainly what fell outside that scope. Until then, treat every figure as a careful reading of the published rules rather than as advice.
Contact and corrections
Email support@clearselftax.com. A report that names the page, the figure you expected and the official document it comes from is checked against that document. If it is right, the data file is corrected, a test is added to pin the corrected figure, and the change appears on the corrections page. The contact page says what to include.