Bitcoin Tax Anxiety Intensifies Content: The IRS can now access your cryptocurrency sales records, and you may need to prove your purchase price. Transaction reports in 2025 lacking cost basis could lead to overstated self-reported gains. Tax experts warn that ignoring cost basis could result in excessively high tax filings. The IRS's new 1099-DA form only shows sales proceeds, requiring individuals to calculate and report cost basis themselves. (cryptoslate)