H-1B Status Change Reporting

You should fill out this e-form:

To report that your H-1B petition for change of status was approved (I-797A Approval Notice from USCIS)
To report that your H-1B petition for consular processing was approved (I-797B Approval Notice from USCIS) and you have re-entered the U.S. in H-1B status.
To report that your H-1B petition for consular processing was approved (I-797B Approval Notice from USCIS) but you have NOT re-entered the U.S. in H-1B status yet.
To report that your H-1B petition was withdrawn by your employer.

International Student Hub