TaxCompass — Italian tax tools

Search TaxCompass's primary-source corpus and return passages to cite. Hybrid semantic + keyword retrieval over Italian tax & company-law primary sources: Normattiva (statute), Agenzia delle Entrate (circolari & guidance), INPS (social security), pinned tax-year tables (IRPEF brackets, INPS rates, forfettario thresholds & coefficienti di redditività), the ATECO 2025 code catalogue, and EU/treaty sources. Each result carries a `chunk_id`, `source`, and (usually) a `url`. Cite the `url` and quote the `text`; do not assert Italian tax facts the passages don't support. Queries work in any language, but Italian keywords improve recall against the (Italian) legal corpus. Args: query: What to search for. Keyword-dense Italian phrasing works best. sources: Optional subset to restrict to (see `list_tax_sources` for keys). Omit to search everything. Unknown keys are ignored. k: Max passages to return (1–12).

List the primary sources the corpus can search, and what each covers. Use this to discover the valid `sources` filter values for `search_italian_tax_sources` and to understand the corpus's coverage.

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Compute exact Italian tax for one regime at a given annual revenue. Deterministic calculation (not an estimate): substitute/income tax, INPS social contributions, net income, and effective rate. `breakdown.eligible` is False when the regime doesn't apply to the inputs (e.g. forfettario above the €85k cap) — present that as "not eligible", not as a real option. Args: revenue_eur: Gross annual revenue in EUR. regime: One of `forfettario_5`, `forfettario_15`, `ordinario`, `ordinario_impatriati`. coefficient: Forfettario coefficiente di redditività (0.40–0.86, set by the activity's ATECO group). Omit for the professional-services default (0.78). Ignored by non-forfettario regimes. cost_ratio: Deductible costs as a fraction of revenue (0–1), used by ordinario/impatriati. Ignored by forfettario.

Compare all Italian regimes side by side at one revenue level. Runs forfettario (5% & 15%), ordinario, and ordinario + impatriati through the deterministic engine and returns them sorted by net income (best first), each with its full breakdown and eligibility. Args: revenue_eur: Gross annual revenue in EUR. coefficient: Forfettario coefficiente di redditività (0.40–0.86); omit for the professional-services default (0.78). cost_ratio: Deductible costs as a fraction of revenue (0–1) for the ordinario regimes.