Official MCP RegistryListed
TapTax
UK self-employed tax: tax so far, receipts, mileage, invoices and Making Tax Digital updates.
First seen 3 Oct 2026. Evidence as of 3 Oct 2026.
15
Tools
From an anonymous probe
1
Source listings
Each with its own history
1
Recorded changes
Since first seen
Tools
| Tool | Description | Behaviour |
|---|---|---|
| add_transaction | Record a business income or expense in the signed-in person's TapTax, such as a receipt or a payment. The category is the HMRC self-employment box it belongs in. The same entry added twice within 10 minutes is recorded once. | Changes data |
| check_mtd_status | Say whether and when Making Tax Digital for Income Tax applies to someone, from their qualifying income: self-employment turnover plus property income, before expenses, as on their Self Assessment return. Employment and pension income do not count. | Read-only |
| check_tax_code | Check whether a UK PAYE tax code (e.g. 1257L, BR, K475, 1257L W1/M1) looks right for a salary and circumstances, explain what it means, and estimate any over- or under-payment. Flat-rate codes (BR, D0, D1) are only judged when hasMultipleJobs is known; without it the verdict is needs_info. Returns a verdict tier; refund figures are estimates, not amounts owed. | Read-only |
| create_invoice | Create a draft invoice in the signed-in person's TapTax, numbered in their sequence and using their saved business details. The invoice is created as a draft and is not sent. Free plans include 3 invoices; paid plans are unlimited. | Changes data |
| estimate_self_employed_tax | Estimate UK income tax and Class 4 National Insurance for a sole trader from turnover and allowable expenses, with the take-home figure, effective and marginal rates, payments on account and tailored tips, from HMRC's published rates for the tax year. Works from the figures given, without a TapTax account. | Read-only |
| get_mileage_summary | The signed-in person's business mileage for a tax year: total miles, the deductible amount at the approved rates, and the most recent trips. | Read-only |
| get_mtd_deadlines | List the standard Making Tax Digital quarterly update periods and deadlines for a tax year, and which one is next. Updates are cumulative from 6 April. | Read-only |
| get_tax_position | The signed-in person's tax year so far, as the TapTax dashboard shows it: business income, expenses and profit counted by the filing rule, the estimated income tax and Class 4 NI, how many transactions still need a business-or-personal decision, which quarterly updates they have filed through TapTax, and the next deadline. | Read-only |
| list_invoices | The signed-in person's invoices, newest first, with each one's live status (a sent invoice past its due date reads as overdue) and the totals outstanding and overdue. | Read-only |
| list_transactions | Search the signed-in person's income and expense transactions, newest first. Filter by tax year or dates, type, text in the description, or needsReview=true for the ones still waiting for a business-or-personal decision (the review queue). | Read-only |
| log_mileage_trip | Record a business journey in the signed-in person's mileage log. TapTax prices it at the approved mileage rate for the tax year (tiered after 10,000 car miles). Commuting to a permanent workplace is not business mileage. Mileage tracking is on the Pro plan. | Changes data |
| mark_invoice_paid | Record that the client has paid an invoice (dated today). Stops any payment reminders. | Destructive |
| prepare_quarterly_update | Get the signed-in person's Making Tax Digital quarterly update ready: the cumulative income, expenses and profit from 6 April to the end of the quarter, what still needs reviewing, and a card with a button that opens TapTax to check and file it. Filing itself always happens in the TapTax app, never from the chat, so HMRC receives the details of the device the person files from. | Read-only |
| send_invoice | Email an invoice with its PDF to the client address on it, from the person's business name. This sends a real email to the client. | Destructive |
| update_transaction | Change a transaction the signed-in person owns: mark it business or personal (this is how the review queue is cleared), or correct its category, description, amount or date. | Destructive |
Change history
- Listed (registry)
| Source | Listing | First seen | Last seen | Versions |
|---|---|---|---|---|
| Official MCP Registry | uk.co.taptax/taptax | 3 Oct 2026 | 3 Oct 2026 | 1 |