kakakul bro, I went through the same process last year , a cpa handles all our papers and we did everything they asked, my cpa is an Indian guy and he told me that there is an Indian guy who handles all the govt tax, he is some kinda head of the department of auditing and is targeting people from India and Nepal and giving everyone a hard time......I dont know if its true or not BUT I suggest you talk to a CPA regarding your letter and have him look at your stuff first before you send it. goodluck