Zecco will give you the info but unless you sign up for their Gainstracker service you won't be able to automatically download it into your tax program, you'll have to read through all the "my account" records. In fact this year even though I have Gainstracker, I'm having issues with it so I'll probably just parse through my statements manually again. It can be a major pain when you have lots of trades.
You're broker will provide you with the necessary tax forms at the end of the year. You'll receive a 1099-B for sure, and a 1099-DIV and/or 1099-INT. You'll use those forms to fill out your schedule D and B if you earned interest or divy's.
Some tax software allows you to import your trade info into it, but requires a specific format. Usually either CSV or TXF. You'll need to see what options your broker offers for exporting the reports, and find tax software that uses that format.
Another option is to sign up with http://www.gainskeeper.com/ and they store all your trade data for taxes and generate your Schedule D for you.
A last resort is filling out the Schedule D by hand, but if you have hundreds or thousands of trades you DO NOT want to do that.
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