Depends on what kind of growing system you use. Raised beds or row/field?
I have raised beds and use a no dig system so digging manure in is a no-no. What I do is to spread a thick layer on the beds (not all of them, depends on amount of manure and rotation) then cover the whole lot up for the winter. The worms pull the manure down into the soil for me. (I do the same with leaves or bin compost.)
If you don't have beds and were thinking about making some, now is the time. Double dig them. Or if you have an established row/field system then single dig it in as muntjac suggests.