Arthur Labs

If your scan fails to complete, or the delivered PDFs are uninstallable, we will resolve the installation ourselves and deliver them over email, please get in contact with us. We try to help solve the issue before providing a full and complete refund. Contact us via the contact form on the site or email the address provided in your scan confirmation. We aim to respond within 1 business day.

Every ERC-20 with a CoinGecko listing is resolved automatically by contract address — not just the top 20 symbols, but 20 native coins (ETH, BTC, SOL, ADA, XRP, DOT, BNB, ARB, OP, AVAX, MATIC, LINK, UNI, AAVE, CRV, MKR, SNX, COMP, LDO, RPL)

18 stablecoins (USDC, USDT, DAI, BUSD, TUSD, USDP, GUSD, FRAX, LUSD, SUSD, MIM, UST, USDD, CRVUSD, PYUSD, FDUSD, USDS, USDBC) are always priced at $1.00.

We maintain a curated static map of major exchange deposit wallets and contracts: Coinbase, Binance, Kraken, Gemini, OKX, Bybit, Bitfinex, KuCoin, and more. When a transaction touches one of these addresses, it is classified as a non-taxable exchange deposit or withdrawal — preserving your cost basis correctly.

Unknown contracts appearing 3+ times are resolved live via Etherscan contract labels, then keyword-matched to a category. This prevents the over-taxation that affects most competing tools.

Your Tax Report PDF and pre-filled 1099-DA are emailed automatically when the scan completes — no return visit to the app required. The welcome email fires at scan start; the report email fires on completion with both PDFs attached.

Dust transactions under $0.05 in proceeds are excluded from 1099-DA output. This threshold is stablecoin-safe: 0.04 USDC ($0.04) is correctly excluded, while 0.0001 ETH worth $0.30 is included. No manual filtering required.