1. Identify the failure
Read your import summary, save the original export, and use the official help article matched to your symptom. This costs nothing.
FREE, SOURCE-BACKED DIAGNOSTIC / 무료 구조적 점검
A rejected file, skipped duplicates, and missing acquisition history are three different problems. Choose your symptom to see a safe first-pass checklist before you alter any import.
Koinly CSV가 거부되거나, 일부 행을 건너뛰거나, 매수 이력이 없다고 나올 때 각각 원인과 확인 순서가 다릅니다. 원본 파일을 지우거나 취득가를 임의로 적기 전에 점검하세요.
An independent Strike iOS customer reported an "Unknown file" import on October 12, 2026 ↗. This is one unresolved user report, not a confirmed format-change announcement, endorsement or paid customer. Open the safe Strike-specific support-first checklist ↗.
Review the vendor import summary before making changes.
Primary documentation: Official Koinly import errors ↗
Each choice is a general diagnostic plan, not an inspection of your transactions. Refer to your official provider's latest documentation before making edits. This page is not legal, accounting or tax advice.
Read your import summary, save the original export, and use the official help article matched to your symptom. This costs nothing.
Our free local-only mapper works on one authorized CSV with explicit mapping. No upload or invented transactions. Supported files should use Koinly's own integration.
Only if one unsupported source header remains: up to ten buyer-authorized, redacted structural rows. Written acceptance of scope, delivery, payee, refund and data handling before payment. Not automated checkout.
No third-party customer purchase for this mini-review is confirmed. An enquiry is not a payment. We do not compute gains, modify a Koinly account, request credentials, or infer missing acquisition prices. For larger cross-export discrepancies, see the separate $49 indicative pilot.
OPTIONAL SUPPORT · ZERO SERVICE OBLIGATION / 자유 후원
This diagnostic, all four checklists and the local column mapper stay free forever. They are completely free whether you send anything or not. A strictly voluntary tip (for example 1 native Circle Base USDC, or zero) can support maintenance. We do not request a signature or connect to your wallet. There is no automatic checkout, no tracking, and no priority access. It is not a charitable/tax-deductible donation.
무료 진단이 유용했다면 선택적으로 후원할 수 있지만 후원하지 않아도 서비스는 완전히 무료입니다. 후원은 작업 주문·세무 검증·우선 지원·환불 약속이 아닙니다. 이 페이지는 지갑을 연결하거나 송금을 요청하지 않습니다.
Network: Base mainnet · eip155:8453
Token: native Circle USDC on Base · 0x833589fCD6eDb6E08f4C7C32D4f71b54bdA02913
Original same-owner public merchant receiver:
0x6b01efA0705E91a7aca54271510bf9e594717f34
Nothing has been copied or paid.
Independently verify before any irreversible transfer. The public receiving address matches our separate original VM5 x402 merchant documentation and prior public Base USDC quote; a website cannot prove the operator currently controls or has recovered the signing key. Your wallet may need gas; transfers on the wrong network or to a wrong recipient can be lost. Do not send sensitive data, wallet secrets or transaction signatures. You decide entirely independently whether, when and how much to send.
No verified voluntary support receipts or new paid Koinly customers are claimed. VM1 and VM5 are projects of one human beneficial owner; the third-party Koinly brand is independent and does not endorse this guide.
These references independently document that skipped records may be intentional, duplicate matching requires near-exact equality, and missing purchase history has multiple causes.
Do not delete transactions solely to make warnings disappear. Keep an original, reversible evidence trail. If your importer and original source disagree on economic treatment, seek your tax professional.