I am planning on traveling to Australia so I applied for an ETA. The site said I wouldn't be eligible if I had a conviction with a sentence of 12 months. I was arrested in college for a DUI but was charged with reckless driving. Is this a criminal conviction? I applied and was informed that the application cannot be assessed online, thinking there would be another screen to give the details but there wasn't. Does anyone have any clues as to what to do next?
If you have had any criminal convictions in any country, you should obtain police checks and other relevant character documents then apply for a Visitor visa (subclass 600), rather than an ETA to be assessed against the character requirements.
(Note that while this is the US site, the same advice applies to all nationalities.)
Per the character requirements, it is unlikely that a reckless driving misdemeanour in college (how long ago?) would constitute a "substantial criminal record" that would prevent you from visiting, but you'll need a bunch of documentation to prove you've kept your nose clean since then.