Over the years, the advice I've read and have been given was to either contact the mfgr. or have a lab do it. You can search the WEB for key words like "vinyl flooring" AND "asbestos". My searches also suggested that if the flooring was installed in the last 20 years, the glue is unlikely to contain asbestos. If you're able to remove the flooring, underlayment and all (I'm not referring to the sub-floor), and you can do it w/o using any power equipment, you can do it safely. You see, heat and friction and all that can make the glue 'airborn', thus, creating a potential respiratory problem. Do wear a mask. I've used tools like an ice chopper, a coal shovel, a pry-bar, a crow bar, claw hammer, and so on. No power tools; not even a hand saw. Be sure to 'size' your waste so the trash hauler will take it. (Ours had to be 4' max., in length by 12" side.)
If you need more info, e-mail me directly. My best to ya and hope this helps.