Arc & Ledger Tax Tools

io.github.Bgenc48Published by GitHub account Bgenc48v1.0.0Updated Oct 24, 2026

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

The publisher's own server: Arc & Ledger Tax Reference

VerifiedStreamable HTTPWeb executableFinanceDeveloper ToolsBusiness & Commerce

Overview

AI-generated overview

Provides specialized tools for navigating US tax issues, IRS notices, business formation, and financial obligations.

What you can do
This server offers a comprehensive suite of tools for US tax compliance, covering IRS notices, FBAR, and various business structures like LLC vs S-Corp. It can estimate penalties, explain complex tax documents (like W-2s and 1099s), calculate quarterly estimates, and advise on international tax treaties and foreign entity reporting (Form 5472). It also assists with business formation state comparisons and sales tax nexus checks.
When to use it
Use this if you are a US business owner, freelancer, or non-US founder dealing with US tax requirements, IRS correspondence, or complex business entity structuring.
Requirements
Runs as a remote endpoint at
Before you install
The server provides estimates and guidance; it does not replace professional tax advice. Consult the provider regarding specific financial commitments or legal filings.

Installation

In SourceWeft

  1. Open Arc & Ledger Tax Tools in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.Bgenc48%2Farc-ledger-tax-tools/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "arc-ledger-tax-tools": {
      "type": "http",
      "url": "https://mcp.arcandledger.com/mcp"
    }
  }
}

README

This repository has no README.

Tools

21

triage_tax_problem

Triage a tax problem

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.

Parametersbriefproblemrequiredlanguageamount_bandyears_behindhas_deadline_soonhas_tax_agency_letter

decode_irs_notice

Decode an IRS notice

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.

Parametersbriefnotice_coderequiredamount_shownreceived_date

check_resolution_options

Check IRS resolution options

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.

Parametersbriefability_to_payrequiredbalance_owed_usdrequiredtax_account_typeall_required_returns_filedbalance_includes_penalties

estimate_irs_penalty

Estimate IRS penalties and interest

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.

Parametersmonths_laterequiredreturn_filedbalance_owed_usdrequired

explain_tax_document

Explain a tax document

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.

Parametersbriefdocumentrequired

deadline_calendar

US filing deadlines for founders

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.

Parametersentity_typerequiredfiling_yearformed_in_ushas_us_source_wageshas_foreign_bank_over_10k

get_document_checklist

Get a document checklist

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.

Parametersservicerequiredlanguagefirst_year_client

check_fbar_fatca

Check FBAR and FATCA obligations

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.

Parameterslives_abroadrequiredaccount_countfiling_statusrequiredunfiled_yearsmax_aggregate_foreign_balance_usdrequired

check_treaty_withholding

Check US withholding and treaty rates (W-8BEN)

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.

Parameterspayee_typeincome_typerequiredpayee_countryrequired

check_itin_eligibility

Screen an ITIN reason and application path

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.

Parametersreasonrequiredhas_ssnrequiredis_foreign_national

check_5472_obligation

Check Form 5472 obligation

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).

Parametersentity_typerequiredformed_in_usforeign_ownedrequiredhad_reportable_transaction

compare_llc_scorp

Compare LLC vs S-Corp

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.

Parametersstatew2_wages_usdfiling_statusspouse_wages_usdcurrently_has_llclicensed_professionexpected_net_profit_usdrequiredowner_salary_estimate_usd

estimate_quarterly_taxes

Estimate quarterly taxes

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.

Parametersstateentityrequiredprior_year_agi_usdytd_net_income_usdrequiredytd_withholding_usdprior_year_total_tax_usd

estimate_reasonable_comp

Estimate S-corp reasonable compensation

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.

Parametersprofit_driverbusiness_net_profit_usdrequired

estimate_accountable_plan

Estimate accountable-plan reimbursements

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.

Parametersbusiness_milescell_internet_usdmarginal_tax_rate_pctbusiness_mileage_periodhome_office_expense_usdother_business_expense_usd

estimate_augusta_rule

Screen the 14-day home-rental rule

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.

Parametersdays_rentedrequiredmarginal_tax_rate_pctfair_daily_rental_rate_usdrequired

estimate_rental_income

Estimate rental property taxes

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.

Parametersrental_daysrental_typeland_percentfiling_statusother_income_usdpersonal_use_daysoperating_expenses_usdannual_rental_income_usdrequiredreal_estate_professionalproperty_purchase_price_usd

compare_formation_states

Compare US formation states

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.

Parameterspriorityoperates_in_californiaraising_venture_capital

check_sales_tax_nexus

Check sales-tax nexus

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.

Parametersstatesannual_sales_usdrequiredtransaction_count

get_fee_quote

Get a fixed-fee quote

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.

Parametersdetailsservicerequiredlanguage

book_consultation

Request a consultation

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.

Parameterstyperequiredtopiclanguage

Version history

1
  1. v1.0.0LatestSep 16, 2026

Score

75% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • License10 pts

    Declare a license in the repository or the registry entry.

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