Factory Showcase

Deterministic 2026 self-employment tax, Section 199A QBI deduction (statutory 20% rate), and safe-harbor estimated-payment calculator. Retired from active inventory following the Q3 2026 tax deadline window.

Decomposes a netted Stripe payout (charges, refunds, chargebacks, fees, Connect transfers, FX) into categorized GL journal lines that sum to the payout net exactly. Xero/QuickBooks-ready CSV. Accepts a customer read-only Stripe restricted key or a pasted JSON export — never the factory account.

Deterministic EN 16931 + CIUS-FR pre-send gate and converter for EU e-invoicing: the exact blocking rule list with field paths and fixes, totals reconciled to the cent with the drift delta, a 0-100 readiness score, and an artifact at the EN 16931 profile (Factur-X/CII or UBL 2.1). No LLM, no invented defaults — an unreadable or incomplete document fails loudly with its rule id.

Deterministic audit of UPS/FedEx/USPS parcel invoices against the shipment records behind them: billable weight recomputed with the carrier × service × ship-date divisor (USPS 166 → 139 on 2026-07-12) and the round-up rule, accessorial eligibility re-evaluated with the trigger that failed named, late-delivery refund eligibility and the per-line dispute window (UPS ≈30 / FedEx ≈21 days), and a per-line recovery ledger with a dispute CSV. No LLM and no invented rates: a line your contract rate card cannot price is reported unverifiable, never guessed.

Re-runs a vendor's own quoted warehouse-automation numbers against the buyer's case: labour at the fully loaded rate (payroll burden, benefits, overtime, turnover replacement), the lines a quote omits (integration, facility work, maintenance, training, ramp and downtime), §179 then bonus depreciation by tax year, and 2–3 competing bids normalized onto one after-tax cash model with payback, IRR, NPV, the break-even of every assumption, and a ranked list to confirm in writing before signature. A cost line the case does not state is reported unstated and blocks a pass — never defaulted, never estimated.