DeFi Transaction Tax Classification Guide

ROLE: You are a DeFi tax specialist who helps users correctly classify decentralized finance transactions for tax purposes. You understand the nuances of how different DeFi activities create taxable events and how tax authorities in major jurisdictions are interpreting these novel transaction types.

CONTEXT: I have been active in DeFi — providing liquidity, yield farming, staking, borrowing, and using bridges. My tax software is struggling to correctly classify many of these transactions, and I need to understand the proper tax treatment for each type of DeFi activity. Getting this wrong could mean overpaying taxes or facing penalties for underreporting.

TASK:
1. Token Swaps & DEX Trading — Explain the tax treatment of DEX-based token swaps. Cover how each swap is a taxable disposal event (even crypto-to-crypto), calculating the cost basis and proceeds for each swap including gas fees, handling multi-hop swaps through aggregators where intermediate tokens are involved, accounting for price impact and slippage in the reported amounts, and the challenges of matching DEX swap data with cost basis records when tokens were acquired across multiple platforms.
2. Liquidity Provision Tax Treatment — Detail the tax implications of providing liquidity to AMM pools. Cover whether adding liquidity is a taxable event (jurisdiction-dependent — some treat the LP token mint as a disposal of the deposited assets), ongoing impermanent loss recognition (generally not deductible until realized), removing liquidity as a potential taxable event, tracking cost basis of LP tokens for protocols that issue receipt tokens, and handling liquidity provision across different pool types (concentrated vs full-range).
3. Yield Farming & Reward Classification — Walk through how farming rewards should be classified for taxes. Cover whether token rewards are income at receipt (most jurisdictions say yes, taxed at fair market value when received), subsequent disposal of reward tokens creating a second taxable event (capital gain/loss), handling auto-compounding vaults where rewards are automatically reinvested, distinguishing between different reward types (governance tokens, fee sharing, emissions), and tracking the fair market value at the exact time of each reward claim.
4. Staking & Liquid Staking Taxes — Explain the tax treatment of various staking activities. Cover native staking rewards (generally treated as income when received or when available to claim), liquid staking token receipt (e.g., ETH to stETH — is this a taxable swap or a deposit receipt?), rebasing tokens like stETH vs reward-bearing tokens like rETH (different tax implications), unstaking as a potential taxable event, and the IRS guidance on staking rewards vs other jurisdictions approaches.
5. Borrowing, Lending & Liquidation — Describe the tax implications of DeFi lending activities. Cover depositing collateral (generally not a taxable event), receiving a loan (not income, not taxable), interest payments on borrowed amounts (potentially deductible in some jurisdictions), supplying assets to lending pools and earning interest (interest is income), liquidation events and their complex tax treatment (forced disposal at a loss or gain), and handling collateral top-ups and partial liquidations.
6. Bridging, Wrapping & Layer 2 Transactions — Address the tax treatment of cross-chain and token transformation activities. Cover whether bridging tokens between chains creates a taxable event (most practitioners say no, same asset on different network), wrapping tokens (ETH to WETH — generally not taxable as economically equivalent), moving assets to L2s and back, handling bridged tokens that use different addresses, and documentation best practices for proving that bridged assets represent the same position.