One on the ticket , which I am pretty much sure, you need a return ticket if you are coming to qatar on a business visa. The problem is not here in Qatar, but immigration officials at Indian airports do ask for a Return ticket if the visa that you hold is a Visit visa, and for that matter the wordings on a Qatar Business Visa are "Business Visit". I have been in and out of Qatar on Business visa for quite a number of times, and this has been my experience.