The deadline to make a choice is tomorrow (February 5, 2021). From a post by Howard County Public School System on January 28, 2021:
Parents/guardians, log in to HCPSS Connect by February 5 to commit to have your child participate in hybrid in-person instruction, or have them remain fully virtual for the remainder of the 2020-2021 school year. Details on how to access the form and on HCPSS’ spring semester are linked below.
Be sure to visit our Student In-Person Return FAQS, https://help.hcpss.org/in-person-students. We are continually updating those questions and answers, as more information becomes available.