After you file

AFAIK the official date is Jan 23 not the 19th. (I believe the 19th was the 2015 date).

<a rel="nofollow" target="_blank" href="https://www.irs.gov/uac/2017-tax-filing-season-begins-jan-23-for-nations-taxpayers-with-tax-returns-...>

And any returns accepted prior to the 23rd for testing will not be processed until the 23rd.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**