Cryptocurrency Tax Problems: IRS Issues for Bitcoin and Digital Asset Holders

The IRS classifies cryptocurrency as property (Notice 2014-21). Every sale, exchange, or use of crypto to purchase goods is a taxable event. Gains are calculated as the difference between your cost basis and the sale price. Short-term gains (held less than one year) are taxed as ordinary income. Long-term gains (held more than one year) qualify for preferential capital gains rates.

Since 2019, all Form 1040 returns include a question: 'At any time during [year], did you receive, sell, exchange, or otherwise dispose of any financial interest in any virtual currency?' Answering 'No' when you should answer 'Yes' is a misrepresentation to the IRS that can be used against you in an audit or enforcement action.

The IRS has issued John Doe summonses to Coinbase, Kraken, and other major exchanges requiring disclosure of all US customer transaction data. If you traded on a major exchange, the IRS likely has your transaction history. Exchanges now issue Form 1099-B or 1099-DA (Digital Asset) to users with significant trading activity.

If you have unreported crypto gains, the best approach is to file accurate amended returns voluntarily before the IRS contacts you. Voluntary disclosure generally results in no criminal referral and a reduction in penalties. You will owe tax plus interest plus accuracy-related penalties (20%) unless reasonable cause can be shown.

Calculating accurate crypto cost basis is complex — especially for high-volume traders or DeFi participants. Cost basis methods (FIFO, specific identification, LIFO) produce different tax results. Missing records can often be reconstructed from exchange transaction histories. We specialize in crypto tax reconstruction and IRS resolution.