Blockpit shows "Missing History" and sets the cost basis to 0 euros. The result: fictitious gains on every sale. TX-Partner reconstructs the missing transaction history and establishes the correct cost basis.
Initial assessment of your Blockpit data - 30 min.
A crypto documentation with multiple exchanges and DeFi usage. Missing imports from previous years lead to a chain reaction in the tax report:
Blockpit shows "Missing History" when import data is missing for the period before the first recorded transaction. TX-Partner sees these scenarios most frequently.
Older exchange accounts were not connected. Coins came from an exchange that is not imported. Especially for platforms that are no longer actively used, years of transaction history are often missing.
Exchanges and wallets that were not imported into Blockpit are completely missing from the crypto documentation. Particularly common: older exchange accounts, wallets on other chains, or platforms that were only briefly used. Blockpit sees the incoming transaction but not the source.
Users often try to fill gaps with manual entries or use Blockpit's "Auto-Balancing" function. Both methods create transactions with a cost basis of 0 EUR. The problem is visually solved, but the tax error remains: every sale is calculated as a full gain.
Crypto tax tools calculate based on imported transactions. If the crypto documentation has gaps, Blockpit sets the cost basis to 0 euros and every sale is treated as a gain.
Crypto Documentation
Transaction history in crypto tax tool
Tax Calculation
Crypto tax tools & tax advisors
Compliance
DAC8, Tax Authority, Tax Advisors
If the transaction history has gaps, Blockpit calculates with a cost basis of 0 EUR and the tax calculation becomes incorrect.
TX-Partner identifies all missing sources and reconstructs the transaction history systematically. Instead of ignoring the warning, the crypto documentation is processed so that the correct cost basis is traceably documented.
Crypto documentation is the foundation. When it's correct, everything after it is correct.
Identify All Sources
Exchanges, wallets, DeFi protocols – TX-Partner finds where data is missing.
Reconstruct Missing History
On-chain data and CSV exports are merged.
Establish Correct Cost Basis
Cost basis prices are traceably documented.
Check Manual Entries
Entries with a cost basis of 0 EUR are identified and correctly documented.
Blockpit shows this warning when transactions for an asset are missing that occurred before the first recorded transaction. The tool then sets a cost basis of 0 EUR – on a later sale, the entire proceeds are calculated as taxable gain, even though the assets were originally purchased.
Yes. In most cases, missing transactions can be reconstructed using on-chain data, CSV exports from exchanges, or manual entries. The key is that all sources are systematically identified and the transaction history is built up completely.
Step-by-Step Guide to Reconstruction:
Reconstruct Missing Crypto History – Step by StepTX-Partner reconstructs the missing transaction history, establishes the correct cost basis, and prepares your crypto documentation for reliable tax reports & proof of funds & proof of funds.
Non-Binding Documentation Check