I am writing to respectfully request permission to defer my studies for four month due to financial difficulties.

Your letter requesting deferment of studies is well-structured and clear. Here are a few minor corrections to enhance its formality and grammar:

1. In the first paragraph, change "four month" to "four months" to correct the pluralization.
2. In the second paragraph, ensure proper capitalization for your degree. It should be "Bachelor of Business Administration and Management".

With these small adjustments, your letter will be even more polished and professional.