If you are currently importing your data via the Binance API, you are unfortunately missing some transactions.
If you traded any discontinued coins like BCN, BTM, BTT, CHAT, CTR, ELC, EOP, HCC, HSR, HS, ICN, LLT, RPX, TRIG or VEN, these need to be imported by CSV as the API does not import them. Please generate a specific CSV for each coin:
Not generated by the CSV are the necessary LOST transactions if you used BNB as a third currency to pay the fee for any of those trades. These need to be entered manually.
Also not included - in neither API nor CSV - is the distribution history. These are forked coins, air drops and commissions. You can find them under your account tab on the Binance Website. They have to be entered manually.