Filing date

[Olgatax1]

what day does 2019 tax season officially begins, 

[Just-Lisa-Now- · Accepted solution]

Barring any unforeseen circumstances, Jan 27th is the day IRS opens for Efiling.

[TAXOH]

Individual efiling on January 27.
Business efiling now.

[abctax55]

Per the IRS AND the Intuit announcements, 1.27.2020

[IRonMaN · Accepted solution]

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@Olgatax1 wrote:

what day does 2019 tax season officially begins, 

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Whenever you prepare your first return, but you can't actually transmit them until 1/27.

[IRonMaN]

Boy, this place sure filled up fast 

[Jim-from-Ohio]

edited, addressed elsewhere