If your old employer wishes to sponsor your again, you may file for a COS to H1B.
The fees would be the same as a new H1B.
Our law firm handles matters like these and will be glad to assist.
Parikh & Prasad Law Group
If you were in the U.S. in H-1B status in the last six years, you may be able to change your status from H-4 to H-1B (and not be subject to the H-1B quota). The H-1B filing fee has to be paid by the petitioning employer. If an H-1B petition is being filed as an extension or amendment with the same employer, the Fraud Detection & Prevention fee may not apply (the other H-1B filing fee/s would still be applicable).
Disclaimer: The information provided here is generalized and should not be relied upon as legal advice. This communication does not create an attorney-client relationship.