Am a Ghanaian please l would like to know when...

If your inquiry is about the date of the opening to receive visa change requests, then you should review the General Administration of Residence through the following link:
The General Administration of Residence  
If you are unable to obtain the required information, then you have to visit their facility in person. Finallym it is worthy to mention that JAWABKOM is a consultation-based website in different sectors. The website has no relations with anu government or nongovernment bodies.
Thank you for your understanding