# Arc & Ledger Tax Reference Muse connector

From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta.

## Arc & Ledger Tax Reference

Decode IRS notices, understand tax deadlines, estimate penalties, and explore payment options.

- Record: https://musedirectory.ai/connector/arc-ledger-tax-reference
- Category: Finance & Bills
- Developer: arcandledger.com (https://www.arcandledger.com/mcp/directory/)
- Muse status: Extra setup. Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
- Health: Working, 213ms, checked 2026-09-28T08:15:57Z
- Endpoint: https://mcp.arcandledger.com/directory/mcp
- Auth: No account needed; Pricing: unknown
- Screening: Screened, no issues found (2026-09-24T01:00:54Z)
- Source: Found in the official MCP Registry (com.arcandledger/tax-tools) https://registry.modelcontextprotocol.io/v0/servers?search=com.arcandledger%2Ftax-tools

Read-only reference for US federal tax notices, filing deadlines, penalty estimates, and resolution options. Explains IRS forms, FBAR/FATCA rules, quarterly tax payments, and rental income calculations using nonidentifying figures only.

Example request: "I got an IRS notice CP2000 dated last month, what does it mean and when do I need to respond?"

How to connect: Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Arc & Ledger Tax Reference to help me. It is a free service with an MCP server at https://mcp.arcandledger.com/directory/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.

Tools:
- 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 procedural step. Do not request the notice itself or any taxpayer identifier.
- check_resolution_options: Use to screen general IRS payment and collection alternatives from a rough balance, filing-compliance status, ability-to-pay category, and coarse tax-account type when known. This is an educational fit screen, not a promise that the IRS will approve an option.
- estimate_irs_penalty: Use to estimate selected federal failure-to-file, failure-to-pay, and underpayment amounts from nonidentifying figures. The result is an estimate and does not replace an IRS account transcript.
- explain_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. Do not request or accept the document itself.
- deadline_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, holidays, extensions, fiscal years, and special facts.
- check_fbar_fatca: Use to screen general FBAR and Form 8938 thresholds from aggregate balance, filing status, residence, and account-count facts. Do not request account numbers, institution names, or statements.
- check_treaty_withholding: Use to explain general US withholding rules, documentation, and supported US-Turkey treaty rates for a payment category. Treaty eligibility and source rules depend on the full facts.
- check_itin_eligibility: Use to screen general ITIN reason categories, whether a return is commonly attached, and supporting-document requirements. Never request or process an actual ITIN, passport, or identity document.
- 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 does not prepare or file the form.
- estimate_quarterly_taxes: Use to estimate federal quarterly tax payments from nonidentifying income, entity, withholding, and prior-year tax figures. Return the assumptions, safe-harbor context, and due dates.
- estimate_accountable_plan: Use to estimate potentially reimbursable business expenses under an accountable-plan scenario, including the split 2026 business-mileage rates. The result does not establish a plan or determine substantiation.
- estimate_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 exclusion separate from the business-side requirements for ordinary and necessary use and reasonable rent.
- estimate_rental_income: Use to estimate a basic rental-income result from nonidentifying figures and identify the modeled depreciation, passive-loss, and personal-use limitations.

Screening checks:
- MCP handshake: pass (Answered in 111ms)
- Domain against threat feeds (Cloudflare security DNS): pass (mcp.arcandledger.com, www.arcandledger.com not flagged)
- Published packages against the OSV malicious-package database: n/a (No npm or PyPI package published)
- Hidden instructions or invisible characters in tool text: pass (13 tools read, nothing found)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (Domain registered 648 days ago)
- AI review of purpose and tool behavior: pass (No concerns)