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Invoice to Tax Prep

Accountants charge by the hour, and disorganised receipts mean bigger bills and missed deductions. The Invoice to Tax Prep skill takes your messy invoice pile and turns it into a categorised, flagged, accountant-ready summary — so the handoff is fast and nothing gets missed.

What this skill does

Most freelancers and small business owners dump receipts in a folder and panic in January. Accountants then charge by the hour for the work of structuring that pile — work that has nothing to do with their actual expertise. This skill closes that gap. It parses whatever you provide — invoices, receipts, expense lists, CSVs, rambling text descriptions — and produces a categorised summary in the format an accountant actually wants to receive.

Income gets separated from expenses, then categorised against standard tax categories. The skill adapts to jurisdiction: UK, US, EU, and Australian tax categories differ in important ways, and it asks before assuming. VAT and sales tax get separated where visible; mixed-use items (phone, car, home office) get flagged for a business-use percentage rather than silently assumed at 100%. Capital items over the local threshold get flagged for capital-vs-revenue treatment rather than expensed by default.

The flags section is the part that pays for the skill. Common missed deductions get surfaced — mileage, home office allowance, professional subscriptions, bank fees — alongside specific anomalies in your data: an Amazon line that could be business or personal, a hardware purchase that might trigger an Annual Investment Allowance, a phone bill that needs a split. Receipts missing date, vendor, amount, or business purpose get called out because most jurisdictions require all four for proof and an undocumented expense is a disallowed one.

It refuses to give tax advice. The skill organises and flags; it does not decide what's deductible, what qualifies for which allowance, or what your final liability is. Those questions go to your accountant, and the summary is built specifically to make that conversation faster — the structure they want, the flags they would have asked for anyway, the missing information listed upfront so nothing gets discovered after filing.

To say it plainly: this is data organisation, not tax advice. Final filing decisions, deduction eligibility, capital treatment, and anything with HMRC, IRS, or local-equivalent consequence belongs with a qualified accountant. The output is a draft handoff document, not a return.

When this triggers

  • ·Tax season is close and you have a folder of receipts and no structure
  • ·You're self-employed and want clean records to hand your accountant in one document
  • ·You want to know what your net position looks like before you walk into the accountant's office
  • ·You need to flag mixed-use expenses (phone, car, home office) before they cause questions
  • ·You suspect you're missing common deductions and want a structured second look

Example

Trigger

User pastes a year of freelance receipts and invoices. 'UK sole trader. £62K invoiced. Want this prepped for my accountant.'

Output

INCOME SUMMARY | Category | Count | Total | |------------------------|-------|---------| | Project Revenue | 17 | £48,400 | | Recurring Retainers | 24 | £13,200 | | TOTAL INCOME | | £61,600 | EXPENSE SUMMARY | Category | Count | Total | Notes | |------------------------|-------|---------|---------------------| | Software & Subs | 38 | £2,140 | Some duplicates flagged | | Hardware | 2 | £1,890 | Capital — flag for accountant | | Travel & Transport | 14 | £620 | | | Telecoms | 12 | £420 | Mixed-use % needed | | Professional Services | 4 | £1,200 | Accountant fee included | FLAGS FOR YOUR ACCOUNTANT 1. New laptop £1,650 — may qualify for Annual Investment Allowance rather than depreciation. Confirm treatment. 2. Phone bill £35/mo — currently logged at 100% business; you mentioned personal use. Suggest 70/30 split, confirm with accountant. 3. Three Amazon transactions over £200 with no descriptor — verify business vs personal before filing. POTENTIAL MISSED DEDUCTIONS · Home office allowance (simplified £6/week or actual) · Mileage (£0.45/mile first 10K) — no mileage log provided · Professional indemnity insurance not detected — do you have one? MISSING INFORMATION [ ] Q4 bank statement — gap between October and December [ ] Vendor name on 6 receipts (faded, cryptic descriptors) NET POSITION (pre-tax, organisational only) Gross Income: £61,600 Total Expenses: £8,640 Net Profit: £52,960 This is data organisation, NOT tax advice. Tax liability, deduction eligibility, capital-vs-revenue treatment, and any final filing decisions are for your accountant. The point of this summary is to make their job faster and stop you missing things.

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What you get

  • 116-line SKILL.md, ready to drop into ~/.claude/skills/
  • Tested through 3 Karpathy-loop iterations (versions v1.0.0 → v1.3.0)
  • Triggers automatically when relevant — no command to remember
  • Lifetime updates as the skill is refined further

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