There are definitely instances where status of one vitamin can affect the status of another. There are also food, mineral and medicinal interactions that can affect nutrient absorption.
I suspect your question concerns the intake of vitamins at the same time, most likely from a supplemental form. A properly designed multiple vitamin/mineral formula (MVM) will have a variety of nutrients, while all ingested at the same time, should allow the release to occur slowly over several hours, negating interference or competitive absorption. Taking your MVM with a meal will help to slow the release and prolong the exposure to nutrients and further minimize any potential interactions.