Categories › Business & Finance › Accounting & invoicing
Read-only US tax reference for notices, deadlines, filing screens, and clearly labeled estimates.
Remote server: your requests and data go to mcp.arcandledger.com. Claude Code: claude mcp add --transport http arc-ledger-tax-reference https://mcp.arcandledger.com/directory/mcp · Claude app: Settings → Connectors → Add custom connector.
The tools this server listed when we connected to it, in its own words.
decode_irs_notice — Use when a user provides the code from an IRS notice or letter and wants a general explanation, the usual response window, or the next procecheck_resolution_options — Use to screen general IRS payment and collection alternatives from a rough balance, filing-compliance status, ability-to-pay category, and cestimate_irs_penalty — Use to estimate selected federal failure-to-file, failure-to-pay, and underpayment amounts from nonidentifying figures. The result is an estexplain_tax_document — Use when a user names a US tax form or information document and wants to understand its purpose, common fields, or usual return treatment. Ddeadline_calendar — Use to return common federal filing and payment dates for a selected filer or entity type. The user must verify the date for weekends, holidcheck_fbar_fatca — Use to screen general FBAR and Form 8938 thresholds from aggregate balance, filing status, residence, and account-count facts. Do not requescheck_treaty_withholding — Use to explain general US withholding rules, documentation, and supported US-Turkey treaty rates for a payment category. Treaty eligibility check_itin_eligibility — Use to screen general ITIN reason categories, whether a return is commonly attached, and supporting-document requirements. Never request or check_5472_obligation — Use to screen common Form 5472 triggers for a foreign-owned US disregarded entity or corporation. The result is a general filing screen and estimate_quarterly_taxes — Use to estimate federal quarterly tax payments from nonidentifying income, entity, withholding, and prior-year tax figures. Return the assumestimate_accountable_plan — Use to estimate potentially reimbursable business expenses under an accountable-plan scenario, including the split 2026 business-mileage ratestimate_augusta_rule — Use to screen the fewer-than-15-days home-rental rule under IRC 280A(g) and calculate conditional amounts. Keep the owner-side income exclusestimate_rental_income — Use to estimate a basic rental-income result from nonidentifying figures and identify the modeled depreciation, passive-loss, and personal-uNot tested by KitScout yet. When our harness runs it, pros, cons and the tasks we tried appear here, with the date and evidence.