Before you figure out where you are going to get the forms and paperwork, let me ask you this;
Do you have between 100,000-5,000,000 dollars?
This is the price range for music use in films, the more popular the aritist, the more money its gonna take to get their permission to use their song.
IF you’re talking about low unknown bands from your town ect, just ask/e-mail/write them and I bet they’d be thrilled you want to use their music for your film…and its a chance they’d let you use it for free.
Don’t expect to get rights to a Madonna or Michael Jackson song, those would cost millions.
You could also have a composer compose your film, lots out there work 4 very cheap, and sometimes free