Hey all!
There's a new tax suite in the town and it's very helpful with great functionality and user experience unlike existing tools.
It's the BearTax
https://bear.tax - Trusted Crypto Tax Assistant for Individuals & CPAs
BearTax integrates with major exchanges like Binance, Bittrex, Coinbase, GDAX, Gemini, Poloniex and let's you import transactions, review them and calculate gain-loss for FREE. To download tax documents, you need to pay depending on number of transactions you have starting $0.99.
Since it's built by power users, they are handling traders with volume of 50K plus transactions and delivering tax documents within few minutes.
Their algorithm intelligently matches withdrawals and deposits across exchanges considering trading fees and many other factors. Also, your balance will never run into negative because the platform provides all orphan transactions (transactions for which it can't find matching withdrawals) for review. Once you review and provide source, things will speed up and you can view your gain-loss information.
Here's a sneak peek of their gain loss dashboard
https://s3.us-east-2.amazonaws.com/bear.tax/images/gainloss.jpg Give it a try and post your feedback here for the community.