How do you attach a tag if you want to just breast them out? Or are you supposed to keep them intact until it reaches final destination?

Proof of Sex

Valid Sep. 1, 2016 through Aug. 31, 2017.

Pheasant or Turkey

It is unlawful to possess a pheasant or turkey (turkey taken in a county where the bag composition is restricted to gobblers and/or bearded hens or taken during any spring turkey season) with proof of sex removed. The following is considered proof of sex and must accompany the pheasant or turkey until it reaches its final destination and is finally processed:
•Pheasant: one leg, including the spur, attached to the pheasant carcass or the entire plumage attached to the pheasant carcass;
•Turkey: in counties where the bag composition is restricted to gobblers and/or bearded hens, a male turkey is required to have one leg, including the spur, attached to the bird; or the bird, accompanied by a patch of skin with breast feathers and beard attached. In counties where the harvest of female turkeys is restricted to bearded hens, all harvested hens must be accompanied by a patch of skin with breast feathers attached.

Exception

Instead of proof of sex, the hunter may obtain a receipt from a taxidermist or a signed statement from the landowner or the landowner's agent containing the following information:
•Name of person who killed the wildlife resource;
•Date the wildlife resource was killed; and
•One of the following, as applicable: whether the deer was antlered or antlerless; the sex of the antelope; the sex of the turkey and whether a beard was attached; or the sex of the pheasant.

I just made a simple form that included the required information and have the landowner/agent/guide sign it to verify proof of sex. I put the completed tag and form in a small ziplock bag inside the larger bag of harvested meat.

Here's a copy of the form I made:

LAND OWNER OR AGENT SIGNED STATEMENT CONFIRMING SEX OF HARVESTED GAME ANIMAL

Name of person who harvested game animal: ______________________

Date of Harvest:____________________

Sex of harvested game animal:_Gobbler______________________

Signature of Landowner or agent attesting to sex of harvested game animal:______________________

FYI...you're going to need to keep the legs too, or risk being cited for wanton waste, at the Game Wardens discretion.

I keep the legs and tag them

Legs here too