I need to send some tax files via email and want it to be encrypted.

What's the best way to encrypt email attachements?

I like Adobe Pro but it's $500.

Is there a good free download?

Might start by looking at PGP (http://www.pgp.com/downloads/desktoptrial/desktoptrial2.html)

What's the best way to encrypt email attachements?Just use WinZip v.9 or later (AES 256) with a long key. For keys use a line from poetry.
Make sure the key is communicated over different channels, e.g. phone.

Diogen.

You should also take a look at TrueCrypt.