The official date that the IRS will start receiving 2019 tax returns is on and after January 27 - https://www.irs.gov/newsroom/irs-opens-2020-filing-season-for-individual-filers-on-jan-27
It usually takes 2 days for your return to be accepted.
I just got an email that mine was accepted already, I thought I read January 27th. I’m okay with that.