Pine tar can be added to any soap recipe.
Generally, pine tar is added at 10%-15% of the total oils weight.
For a recipe with 22 oz of oils, approximately 3 oz of pine tar would be appropriate.
Pine tar can greatly accelerate the soap batter, so a slow-moving recipe is recommended.
The contents of pine tar are mostly unsaponifiable; pine tar has a SAP value of 0.043.
If 3 oz of pine tar is being added to the soap batter, technically another 0.1 oz (3.7 g) of lye should also be added.
Superfat in the soap will make this amount of lye negligible.

The National Institutes of Health indicates that “pine tar has been used in medicine for more than 2000 years to treat a range of skin conditions because of its soothing and antiseptic properties”. (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5434829/) Whether or not these properties survive the saponification process is debatable.

Pine tar has a unique color and scent; no colorants or fragrance are needed (but can be added if desired).
Personally, I prefer the smell of Dalbrand Tratjara
Recommended method of preparing soap batter with pine tar:

1. Split the warm oils into halves:
2. Add the pine tar (and fragrance if used) to one half, and blend really well.
3. Add the lye solution to the other half, and blend to emulsification.
4. Whisk the pine tar mixture into the soap batter until the batter looks dull and slightly grainy; then quickly pour the batter into the mold.
5. Leave the loaf uncovered & cut sooner than usual.