Solution: A guided platform: (1) Connect exchanges and wallets, or upload CSVs, and the tool reconstructs cost basis across all sources using acquisition records; (2) 1099-DA reconciliation — compares what each exchange reported to the IRS against your real records, flags every mismatch, and shows exactly where the $0-basis problem is; (3) Accurate Form 8949 generator that reconciles to the gross proceeds the IRS already has; (4) CP2000 response builder — generates a properly-formatted response letter with reconstructed basis, supporting schedules, and the exact language that resolves cases at the correspondence level; (5) Deadline and collection-hold tracker for notice response windows; (6) Audit-defense documentation pack preserving original timestamps and basis methodology. ICP: US crypto investors aged 25–55 who moved assets between exchanges or into self-custody, then sold on a major exchange (Coinbase, Kraken, Gemini). Their 1099-DA reports the full sale amount to the IRS but shows $0 or no cost basis — so the IRS's automated matching system thinks a $200K sale is $200K of profit. They're terrified, losing sleep, and facing either a huge tax overpayment or a CP2000 notice demanding tax they don't actually owe.

The CP2000 defense workflow is the entire moat — every existing crypto tax tool stops at return preparation, but the new acute pain is the notice that arrives months later. The reconciliation engine that specifically matches your 8949 to the gross proceeds figure the IRS already holds (rather than just computing 'correct' numbers in a vacuum) is what prevents the automated mismatch flag.

“Similar to how TaxAudit built businesses around IRS audit defense as a distinct product from tax preparation (TurboTax). This is audit/notice defense for the crypto era: the return-prep tools (Koinly, CoinTracker) are the equivalent of TurboTax, and this product is the defense layer that activates when the IRS pushes back.”