I am afraid to say that I don't have a clue as to what on earth you are talking about, sir. But whatever it is, it is most probably something I do not wish to know about...
"Allow for" and "allow +object + to + verb" have different meanings. "The new budget allows for unexpected expenses." Here, "allows for" means "leaves room for the unpredictable" or "gives leeway."...
Parents is plural, then
"Do your parents allow you?" or "Your parents allow you"
If used in the singular form:
"Does your parent allow you?" or "Your parent allows you"