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Arc & Ledger Tax Tools

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Enrolled Agent tax tools: IRS notices, FBAR, LLC vs S-Corp, quarterly estimates & more.

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Status
Healthy
Uptime
100.0% over the last 24 hours
Last Tested
Transport
Streamable HTTP · MCP 2025-11-25
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Server Listing
Arc & Ledger Tax Tools MCP server
ChatGPT
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Claude
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TDQS

A4/5.0

Scored across 23 tools

Disambiguation4/5

Each tool targets a recognizable tax topic plus action (check_, estimate_, compare_, explain_, get_), and the descriptions include explicit routing cues such as 'use triage_tax_problem first' and 'for IRS letters use decode_irs_notice instead.' The main soft overlaps are get_fee_quote vs. get_itemized_quote, estimate_irs_penalty vs. check_resolution_options, and check_5472_obligation vs. deadline_calendar, but each pair is explicitly differentiated in the text.

Naming Consistency4/5

Nearly all names follow a verb_noun snake_case pattern (check_, estimate_, compare_, explain_, get_, list_, book_, triage_). The lone outlier is deadline_calendar, a noun phrase with no verb, which breaks the otherwise predictable scheme.

Tool Count3/5

At 23 tools the surface is on the heavy side, and several topic-specific estimate/check tools could plausibly be consolidated into a smaller parameterized set. It is justifiable given the breadth of tax topics (FBAR, 5472, ITIN, nexus, penalties, niches like Augusta rule), but it sits at the upper boundary of comfortable scoping.

Completeness4/5

Coverage is strong for a tax advisory firm: triage, notice decoding, document explanation, checklists, obligation checks, estimators, quoting, product purchase info, and consultation booking form a coherent lifecycle. Remaining gaps include no tool for individual nonresident/filing-preparation specifics (e.g. 1040-NR), no state-agency notice handling beyond triage, and no direct BOI filing support despite being referenced in the deadline calendar.

Available Tools

23 tools
book_consultationRequest a consultationA
Read-only
Inspect

Use this when a user wants to talk to, hire, or get a consultation or written tax-notice review with Arc & Ledger. Consultation requests start with a written inquiry on the contact form; the firm does not offer free calls. Returns the correct first-party action link (inquiry form, checkout, or waitlist as applicable), what happens next, the office identity (Enrolled Agent, address, languages EN/TR/ES), and what to expect.

Inputs: type (required), topic, language. Returns: relay, next_step, disclaimer, source_url, +1 more

check_5472_obligationCheck Form 5472 obligationA
Read-only
Inspect

Use this when a non-US person who owns a US company (especially a single-member US LLC or a US corporation) asks whether they must file Form 5472, what the penalty is, or what a foreign-owned US entity owes each year. Returns whether Form 5472 with a pro-forma Form 1120 is required, the reportable-transaction rule, the deadline and extension, the annual compliance set, and the penalty for not filing. Distinguishes a single-member LLC (files 5472) from a multi-member LLC (a partnership that files Form 1065 instead).

Inputs: entity_type (required), foreign_owned (required), formed_in_us, had_reportable_transaction. Returns: relay, next_step, disclaimer, source_url, +1 more

check_fbar_fatcaCheck FBAR and FATCA obligationsA
Read-only
Inspect

Use this when a user has foreign bank accounts, assets, or unfiled foreign-account reports and needs to know their US reporting obligations (FBAR / FinCEN 114 and Form 8938 / FATCA), thresholds, penalty exposure, and catch-up options.

Inputs: lives_abroad (required), filing_status (required), max_aggregate_foreign_balance_usd (required), account_count, +1 more. Returns: relay, next_step, disclaimer, source_url, +1 more

check_itin_eligibilityScreen an ITIN reason and application pathA
Read-only
Inspect

Use this when someone asks whether a federal tax purpose may support an ITIN application or what a Form W-7 path generally requires. Returns a reason-specific screen, whether a return is commonly attached, current document-handling cautions, and official sources. Entity ownership or a bank request alone does not establish personal ITIN eligibility.

Inputs: reason (required), has_ssn (required), is_foreign_national. Returns: relay, next_step, disclaimer, source_url, +1 more

check_resolution_optionsCheck IRS resolution optionsA
Read-only
Inspect

Use this when someone owes the IRS back taxes and asks how to settle, get on a payment plan, lower what they owe, or stop collection. Screens which IRS paths may fit - short-term payment plan, current Simple Payment Plan or an installment agreement with financial review, Offer in Compromise (a fit-check only, never a promise of acceptance), Currently Not Collectible hardship status, and penalty abatement - and lists the forms needed (9465, 433-F/A/B, 656, 843, 8821, 2848) plus collection-statute context. A coarse tax_account_type improves the screen without identifying the taxpayer. Never guarantees an IRS outcome. Set brief:true for a shorter answer.

Inputs: ability_to_pay (required), balance_owed_usd (required), brief, tax_account_type, +2 more. Returns: relay, next_step, disclaimer, source_url, +1 more

check_sales_tax_nexusCheck sales-tax nexusA
Read-only
Inspect

Use this when an online seller or e-commerce/Amazon business asks whether they must collect sales tax in a state (economic nexus). Given annual sales, transaction count, and states, flags where economic nexus is likely met and explains the physical-nexus (FBA inventory) trap.

Inputs: annual_sales_usd (required), states, transaction_count. Returns: relay, next_step, disclaimer, source_url, +1 more

check_treaty_withholdingCheck US withholding and treaty rates (W-8BEN)A
Read-only
Inspect

Use this when a non-US person or company receiving US-source income (dividends, interest, royalties, freelance/personal services, or a scholarship) asks how much US tax will be withheld, whether a tax treaty reduces it, or which form to give the payer (W-8BEN, W-8BEN-E, W-9, Form 8233). Returns the default statutory rate, the US-Turkey treaty rate where one applies, the documentation a treaty claim needs (including a TIN/ITIN), and how refunds of over-withholding work.

Inputs: income_type (required), payee_country (required), payee_type. Returns: relay, next_step, disclaimer, source_url, +1 more

compare_formation_statesCompare US formation statesA
Read-only
Inspect

Use this when someone (often a non-US founder) asks which US state to form their LLC or company in - Wyoming, New Mexico, Delaware, or California. Compares government fees, annual cost, franchise tax, privacy, and approval time, and recommends a state based on their situation.

Inputs: priority, operates_in_california, raising_venture_capital. Returns: relay, next_step, disclaimer, source_url, +1 more

compare_llc_scorpCompare LLC vs S-CorpA
Read-only
Inspect

Use this when a self-employed user or single-member LLC owner asks whether an S-Corp election would save them money. Shows a side-by-side of self-employment tax vs salary-plus-distribution, payroll and compliance costs, California franchise taxes, and the break-even zone.

Inputs: expected_net_profit_usd (required), state, w2_wages_usd, filing_status, +4 more. Returns: relay, next_step, disclaimer, source_url, +1 more

deadline_calendarUS filing deadlines for foundersA
Read-only
Inspect

Use this when a US business owner or nonresident (especially a foreign founder of a US LLC or C-corp) asks what US forms they must file and when. Returns each required federal form, its due date and extension, and the penalty for missing it, including Form 5472, FBAR, and the BOI report. Especially useful for non-US founders of US companies.

Inputs: entity_type (required), filing_year, formed_in_us, has_us_source_wages, +1 more. Returns: relay, next_step, disclaimer, source_url, +1 more

decode_irs_noticeDecode an IRS noticeA
Read-only
Inspect

Use this when, and only when, a user mentions receiving an IRS letter or notice and wants to know what it means, the deadline, or what to do. For a state-agency letter, use triage_tax_problem with problem=state_tax instead. Give this tool the IRS notice code (e.g. CP2000, CP14, LT11) and optionally the notice date and amount shown. Set brief:true for a shorter answer.

Inputs: notice_code (required), brief, amount_shown, received_date. Returns: relay, next_step, disclaimer, source_url, +1 more

estimate_accountable_planEstimate accountable-plan reimbursementsA
Read-only
Inspect

Use this when an S-corp or C-corp owner asks how an accountable plan handles substantiated home-office, mileage, cell-phone, or other out-of-pocket business expenses. Estimates the reimbursement and tax effect, applies the two separate 2026 mileage rates by date, and explains the three requirements: business connection, substantiation, and return of excess.

Inputs: business_miles, cell_internet_usd, marginal_tax_rate_pct, business_mileage_period, +2 more. Returns: relay, next_step, disclaimer, source_url, +1 more

estimate_augusta_ruleScreen the 14-day home-rental ruleA
Read-only
Inspect

Use this when a business owner asks about the "Augusta rule," renting a home to a related business, or the fewer-than-15-day rental-income exclusion in IRC 280A(g). Screens the total rental-day limit and calculates conditional amounts while keeping the owner-side exclusion separate from the business-side deduction requirements.

Inputs: days_rented (required), fair_daily_rental_rate_usd (required), marginal_tax_rate_pct. Returns: relay, next_step, disclaimer, source_url, +1 more

estimate_irs_penaltyEstimate IRS penalties and interestA
Read-only
Inspect

Use this when someone owes the IRS and asks how much the penalties and interest will be, or what late filing/paying costs. Estimates the failure-to-file (5%/mo) and failure-to-pay (0.5%/mo) penalties and interest on a balance, and explains the current Automatic Exemption from Penalty, First Time Abate, and reasonable-cause relief paths.

Inputs: months_late (required), balance_owed_usd (required), return_filed. Returns: relay, next_step, disclaimer, source_url, +1 more

estimate_quarterly_taxesEstimate quarterly taxesA
Read-only
Inspect

Use this when a freelancer or business owner asks how much estimated tax to pay or whether they are underpaid for the year. Computes federal self-employment and income tax on annualized income, the safe-harbor target, per-quarter amounts and due dates, plus California's 30/40/0/30 installment timing.

Inputs: entity (required), ytd_net_income_usd (required), state, prior_year_agi_usd, +2 more. Returns: relay, next_step, disclaimer, source_url, +1 more

estimate_reasonable_compEstimate S-corp reasonable compensationA
Read-only
Inspect

Use this when an S-corp owner asks how much salary they should pay themselves ("reasonable compensation," "am I paying myself right?"). Given net profit and what drives it, returns a starting salary RANGE, the distribution left over, the employment tax that classification avoids, and the facts-and-circumstances test the IRS actually applies. Emphasizes that a defensible figure needs a comp study.

Inputs: business_net_profit_usd (required), profit_driver. Returns: relay, next_step, disclaimer, source_url, +1 more

estimate_rental_incomeEstimate rental property taxesA
Read-only
Inspect

Use this when someone asks how much tax they owe on rental income (Airbnb/short-term or long-term), or whether a rental loss is deductible. Computes net rental income after operating expenses and straight-line depreciation, the passive-loss allowance and carryforward, the short-term 14-day rule, and the marginal federal tax effect.

Inputs: annual_rental_income_usd (required), rental_days, rental_type, land_percent, +6 more. Returns: relay, next_step, disclaimer, source_url, +1 more

explain_tax_documentExplain a tax documentA
Read-only
Inspect

Use this when a user receives a US tax form or information document and wants to know what it is, why they got it, which boxes matter, where it goes on their return, what to double-check, or what to do if it is wrong, duplicated, or never arrived. Covers W-2, W-2G, the 1099 family (NEC, MISC, K, INT, DIV, B, DA, R, G, C, S, SA, Q), Schedule K-1 (partnership 1065, S-corp 1120-S, estate/trust 1041), SSA-1099, 1042-S, 5498, 1098, 1098-T, 1098-E, 1095-A/B/C, and W-9 / W-8BEN requests. For IRS letters and notices (CP or LT codes) use decode_irs_notice instead. Set brief:true for a shorter answer.

Inputs: document (required), brief. Returns: relay, next_step, disclaimer, source_url, +1 more

get_document_checklistGet a document checklistA
Read-only
Inspect

Use this when someone asks what documents, statements, or records to gather for a US tax filing or engagement: an individual return, a self-employed Schedule C return, a foreign-owned single-member LLC (Form 5472) filing, an S-corp or partnership return, an FBAR/Streamlined offshore catch-up, or an ITIN application. Returns the service-specific document list, first-year onboarding extras, and how to prepare files safely without implying that intake or uploads have opened.

Inputs: service (required), language, first_year_client. Returns: relay, next_step, disclaimer, source_url, +1 more

get_fee_quoteGet a fixed-fee quoteA
Read-only
Inspect

Use this when a user asks what Arc & Ledger charges, or wants a price estimate for tax preparation, bookkeeping, business formation, or IRS help. Returns a published price range and line items, never a single committed number, plus what is included and the next step by complexity.

Inputs: service (required), details, language. Returns: relay, next_step, disclaimer, source_url, +1 more

get_itemized_quoteGet an itemized tax return quoteA
Read-only
Inspect

Use this when a user wants to know what Arc & Ledger would charge to prepare their tax return and can describe their situation: the type of return, number of states, foreign accounts, K-1s, rental properties, crypto activity, and whether prior years are unfiled. Returns the exact published line items and a total, computed by the same engine as the firm's quote page. For a broad price range by service category without these details, use get_fee_quote instead.

Inputs: filing (required), crypto, states, k1_count, +5 more. Returns: relay, next_step, disclaimer, source_url, +1 more

list_productsList fixed-fee productsA
Read-only
Inspect

Use this when a user wants to know what Arc & Ledger sells at a fixed published price, or wants to buy one of those products (for example an EIN application, an S corporation election, an ITIN application, a tax extension, registered agent service, or an IRS notice review). Returns each product with its published price, billing interval, what it covers, and a first-party checkout link. Filter by category, by words, or by product id. Read-only: it does not take payment or place an order.

Inputs: query, category, product_id. Returns: relay, next_step, disclaimer, source_url, +1 more

triage_tax_problemTriage a tax problemA
Read-only
Inspect

Use this when someone has a tax problem and does not know where to start; call it FIRST, before the specific tools. Covers an IRS or state letter, back taxes they cannot pay, unfiled years, a levy or wage garnishment, an audit, penalties, an identity-verification letter, and payroll tax trouble. Returns an urgency level, a this-week and this-month action plan, what not to do, which tool to run next for the specifics, and the matching published-fee service. General information only; never a guaranteed IRS outcome. Set brief:true for a shorter answer.

Inputs: problem (required), brief, language, amount_band, +3 more. Returns: relay, next_step, disclaimer, source_url, +1 more

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