On Jan 4 Turbo Tax started letting you submit 1040EZ returns. Even though you can submit your efile to Turbo Tax they will just hold them until the IRS opens on Jan 29. See <a rel="nofollow" target="_blank" href="
https://www.irs.gov/newsroom/2018-tax-filing-season-begins-jan-29-tax-returns-due-april-17-help-avai...>
But for 1040A and full 1040 returns some of the 2017 forms haven't been approved by the IRS yet. The IRS has to separately approve the electronic forms the tax programs use. See the link posted above. Like schedule A won't be finalized until Jan 18 (scroll way down the list).
