WashSaleCheck
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Spot Cross-Account RSU & ESPP Wash Sales Your 1099-B Missed

Drop your RSU/ESPP vest CSV and your taxable brokerage trade CSV. All 30-day collision math runs locally in your browser RAM—your financial data never leaves your computer.

Diagnostic Alert Only — Not Tax Advice: This tool detects ±30-day cross-account ticker collisions to help you flag potential wash sales for your CPA or tax software. Always verify with a qualified tax professional before filing IRS Form 8949.

1. Load Your CSV Exports

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