Yews can have monstrous roots. And they seem to have a couple of levels of the fine roots, so if you collect it with the top 6-8 inches of soil, those roots may not be enough to support the plant.
I have had poor luck with these, even though they're said to be tough. My advice would be to trench around the trunk, say 2 feet wide, and cut down deep enough to sever any large side roots. Then backfill with good soil and let it alone until at least spring 2018, or even the next spring. Might be too conservative, but like I said, I've had bad luck digging big yew.
This assumes the yew is on your property, not somewhere where someone wants it gone ASAP.
Keep us posted.
CW