I am on the birth control pill. is it safe to take vit.d3 (contains soybean oil), vit.c and vit.b6? i read these can effect the pill & want to be sure

Sounds ok: Taking typical doses of common over-the-counter vitamins, such as vitamin D, vitamin C, and vitamin B, should not have a noticeable effect on one's oral contraceptives or on any other form of birth control. The usual doses of over-the-counter vitamins should not interfere with birth control pills.

No problem: These can be taken together and the effects will be what you want.