IRS announced 1/15/2021, that e-file will start on February 12th,2021 to accept 2020 tax returns. The start of the season has been delayed due to the tax law changes on Dec. 27th.
Currently you can transmit returns. The returns will be held until February 12th and assuming the volume will be large it will take some time to transmit and receive acks. I would expect a few days to process the volumes.
Returns with EIC and ACTC will not be funded until the first week of March. According to the Path Act.
This is an evolving story. So maybe we will see additional updates to this. As we know information, we will share it with you.