H1B Approved - Urgent help needed

  • My H1B was filed with a start date of October 1, 2024, but approved on January 5, 2025.
  • The H1B was approved with a change of status, and I was working with a different employer on OPT until now (January 5). Did'nt work for H1b employer.

My concerns:

  1. Does my H1B status officially begin on October 1, or January 5 (the approval date)?
  2. Could this gap (October to January) cause problems for future H1B transfers, extensions, or green card applications?
  3. Should Employer take any corrective actions (e.g., filing an amendment)?

Note: Notice still not received. I received an email from SEVP stating that my OPT has ended, so I’m assuming the H1B was approved with a change of status.

I’d appreciate any advice. Thanks in advance!