Short references only—not tax or legal advice. Use official IRS instructions for your year.
What “single,” “married filing jointly,” and related terms mean at a high level for federal returns.
Open filing statusBrief descriptions of common IRS forms and exports (W-2, 1099s, 1098, trade CSVs, etc.).
Open forms & definitionsIRS extension overview, Form 4868, and links to state agencies.
Open file extensionsFederal brackets and standard deduction tables used by the estimator toy model, plus an illustrative state stub.
Open tax brackets