The ability to change the exam center after applying for the West Bengal Civil Service (WBCS) exam depends on the rules and regulations of the West Bengal Public Service Commission (WBPSC), the organization responsible for conducting the exam. In some cases, candidates may be able to change their exam center by submitting a request to the WBPSC. However, the WBPSC may also impose restrictions on changing the exam center, such as a deadline for submitting the request, a fee for the change, and availability of seats at the desired exam center. It is important for candidates to check the latest rules and regulations on the official website of the WBPSC before applying for the WBCS exam. If a candidate needs to change their exam center, they should submit the request as early as possible to ensure it is processed in time for the exam. In any case, it is advisable for candidates to choose an exam center that is convenient and accessible to them, and to avoid changing the exam center unless it is absolutely necessary.