plugin.json

{
  "$schema": "https://agent-plugins.org/schemas/1.0.0/plugin.schema.json",
  "name": "tax",
  "version": "1.1.1",
  "description": "Get the US federal tax numbers right, with the IRS document each one comes from.",
  "author": {
    "name": "HI\u1ebeU V\u0168 TRUNG NGUYEN",
    "email": "support@openkrill.app",
    "url": "https://tools.openkrill.app/"
  },
  "homepage": "https://tools.openkrill.app/",
  "extensions": {
    "com.openai": {
      "interface": {
        "displayName": "Tax Numbers",
        "shortDescription": "US tax figures, VAT, sales tax",
        "longDescription": "Get the US federal tax numbers right, with the IRS document each one comes from.\n\nAsk \"what are the 2026 tax brackets for a married couple?\", \"what is the standard deduction for head of household?\", \"what was the IRS mileage rate on 15 March?\", \"when is the next estimated tax payment due?\" or \"roughly how much federal tax on $90,000 of wages and $30,000 of freelance income?\".\n\nTax Numbers holds the federal income tax figures for tax years 2025 and 2026: brackets, standard deduction, long-term capital gains thresholds, the Social Security wage base and self-employment tax, 401(k) and IRA limits, the standard mileage rates, and the filing and estimated-payment deadlines. Every figure comes with the Revenue Procedure, notice or IRS page it was read from, and every answer says when the table was last verified. A year is added only after all of its figures have been checked.\n\nIt can also work out a simple federal estimate: standard deduction only, with self-employment tax, long-term capital gains and the Additional Medicare Tax. Every estimate lists its assumptions and what it leaves out (credits, state tax, alternative minimum tax, itemized deductions and more), and says it is an estimate and not tax advice.\n\nIt also answers a seller's question about registration: tax_duty takes where you sell from, where your buyers are (an EU country, the United Kingdom or a US state), what you sell and your yearly sales, and says whether you must register, the limit, the standard rate and how often you file. Every answer links the official tax authority page it comes from, shows the day that page was read and ends with a note to check with an accountant. It covers the 27 EU member states with the One Stop Shop limit of 10,000 EUR, the United Kingdom and 14 US states. A place that is not in the table gets an explicit not covered answer with the list of places that are, never a guess. Reduced rates, local taxes, sales to businesses and domestic limits inside an EU country are not included.\n\nIt does not fill in or file returns, give advice on what to do, or cover US state income tax. Your figures are used for the one calculation and are not stored; the only lasting record is a daily count of calls per tool.",
        "developerName": "HI\u1ebeU V\u0168 TRUNG NGUYEN",
        "category": "Finance",
        "capabilities": [
          "Looks up federal tax brackets, standard deduction and capital gains thresholds with IRS citations",
          "Gives the Social Security wage base and self-employment tax rules",
          "Gives 401(k) and IRA contribution limits",
          "Finds the IRS standard mileage rate for any date",
          "Lists filing and estimated-payment deadlines for a tax year",
          "Estimates federal tax with stated assumptions and exclusions",
          "Says if a seller must register for VAT or sales tax in the EU, UK or a US state, with limit, rate and filing",
          "Adds an official source link, the check date and an accountant note to every duty answer"
        ],
        "websiteURL": "https://tools.openkrill.app/",
        "privacyPolicyURL": "https://tools.openkrill.app/privacy",
        "termsOfServiceURL": "https://tools.openkrill.app/terms",
        "supportURL": "https://tools.openkrill.app/support",
        "defaultPrompt": [
          "What is the 2026 standard deduction for a single filer?",
          "I sell e-books from Germany with 14,000 EUR sales to France. Must I register for VAT?",
          "Roughly how much federal tax on $90,000 of wages and $30,000 of freelance income in 2026?"
        ],
        "brandColor": "#15803D",
        "brandColorDark": "#16A34A",
        "composerIcon": "./assets/icon.svg",
        "logo": "./assets/icon.svg"
      },
      "review": {
        "demo_recording_url": "https://tools.openkrill.app/demos/tax.mp4",
        "test_cases": {
          "positive": [
            {
              "description": "status current; a row Standard deduction of 16,100 dollars for single, with its source Rev. Proc. 2025-32 section 4.14(1) and the URL of the Revenue Procedure; last_verified is present. Check against: IRS Rev. Proc. 2025-32 section 4.14(1): the 2026 basic standard deduction is $16,100 for unmarried individuals and married individuals filing separately.",
              "prompt": "What is the standard deduction for a single filer in 2026?",
              "tools_triggered": "get_tax_parameters",
              "expected_behavior": "Calls get_tax_parameters with year 2026, topic \"standard_deduction\" and filing_status \"single\"."
            },
            {
              "description": "status ok; must_register yes because 14,000 EUR is over the 10,000 EUR One Stop Shop limit; rate 20 percent standard for France; a quarterly return due at the end of the month after the quarter; sources linking the European Commission One Stop Shop and the Taxes in Europe Database with the day each was checked; the not tax advice line. Check against: European Commission One Stop Shop page: the 10,000 EUR limit; Taxes in Europe Database: France standard rate 20 percent.",
              "prompt": "I run a German shop that sells e-books. I made 14,000 EUR from buyers in France this year. Do I have to register for VAT, and at what rate?",
              "tools_triggered": "tax_duty",
              "expected_behavior": "Calls tax_duty with seller_country \"DE\", buyer_place \"FR\", product_kind \"digital_products\" and yearly_sales 14000."
            },
            {
              "description": "status ok; business 72.5 cents per mile, medical 20.5, charity 14, period 2026-01-01 to 2026-06-30 and notice IR-2025-128 (the rates changed on 1 July 2026). Check against: IRS standard mileage rates table: 2026 (Jan 1 - June 30) is 72.5 / 14 / 20.5 cents per mile, IR-2025-128.",
              "prompt": "What was the IRS business mileage rate on 15 March 2026, and what is it for medical driving?",
              "tools_triggered": "get_mileage_rate",
              "expected_behavior": "Calls get_mileage_rate with date \"2026-03-15\"."
            },
            {
              "description": "status ok; next is Estimated tax payment 4 on 2027-01-15, with the four estimated dates 2026-04-15, 2026-06-15, 2026-09-15 and 2027-01-15, source Form 1040-ES (2026). Check against: Form 1040-ES (2026): payments are due April 15, June 15, September 15 and January 15, 2027.",
              "prompt": "It is 1 October 2026. When is my next estimated tax payment due for the 2026 tax year?",
              "tools_triggered": "tax_deadlines",
              "expected_behavior": "Calls tax_deadlines with year 2026 and as_of \"2026-10-01\"."
            },
            {
              "description": "status ok; se_tax 14,129.55, taxable_income 76,835.23, ordinary_tax 11,615.75, total 25,745.30, marginal_rate 0.22, with assumptions, not_included (credits, state tax, alternative minimum tax and more) and the disclaimer Estimate, not tax advice. Check against: Schedule SE: 92.35% of 100,000 is 92,350; 12.4% is 11,451.40 and 2.9% is 2,678.15 so the tax is 14,129.55 (below the 184,500 wage base); half, 7,064.78, is deducted; 100,000 minus 7,064.78 minus the 16,100 standard deduction is 76,835.22; the 2026 single brackets give 1,240 + 4,560 + 22% of 26,435.22.",
              "prompt": "Roughly how much US federal tax would I owe in 2026 as a single filer with $100,000 of freelance income and no other income?",
              "tools_triggered": "estimate_federal_tax",
              "expected_behavior": "Calls estimate_federal_tax with year 2026, filing_status \"single\", wages 0 and self_employment_income 100000."
            }
          ],
          "negative": [
            {
              "description": "The plugin has published figures and a simple estimate; it never fills in or files anything. Expected: Does not call the tool to prepare a return. Explains that it only looks up federal figures and gives estimates, and cannot prepare or file a return.",
              "prompt": "Please prepare and e-file my 2025 tax return for me."
            },
            {
              "description": "State tax is outside the federal tables the plugin holds. Expected: Does not call estimate_federal_tax for a state figure. Says the plugin covers US federal tax only and does not cover state taxes.",
              "prompt": "How much California state income tax will I owe on $120,000 of wages?"
            },
            {
              "description": "The plugin looks up published rules; it registers no one and holds no reduced rate tables. Expected: Does not register anything. May call tax_duty for the standard rate and registration limit, and says reduced rates are not in the table and to check with an accountant or the tax authority.",
              "prompt": "Register my company for VAT in Germany for me, and tell me if my toy qualifies for the reduced rate."
            }
          ]
        }
      },
      "publication": {
        "release_notes": "First release. US federal tax figures for tax years 2025 and 2026 with an IRS citation on every row, the standard mileage rates since 2022, filing and estimated-payment deadlines, and a simple federal estimate (standard deduction, self-employment tax, long-term capital gains). New: tax_duty says whether a seller must register for VAT or sales tax in an EU country, the United Kingdom or one of 14 US states, with the limit, the rate, the filing rhythm and an official source link and checked date on every answer."
      },
      "apps": "./.app.json"
    }
  }
}