Everything you need can be packed into two suitcases and your carry-on bag. Your package may be held at the customs office and you may have to retrieve it yourself. Usually their parents have declared a high value on the contents for insurance purposes. Much to their dismay, students find they must pay extremely high customs taxes. Packages sent to France must include a list of contents and value information.
Vitamins require an accompanying prescription to be delivered.
Do not declare food or candy.