how do i file for temp full custody of a child i have raised since birth

  Ms. Burke, Unfortunately, courts throughout most of Virginia are operating on a limited schedule,  due to the Corvid19 pandemic, dealing only with emergency matters.  Once the Courts reopen, you may wish to contact your local court to discuss the intake procedures necessary to file a custody petition. Filing a petition has nothing to do with the merits of the case.  Once a petition has been filed, it will be your responsibility to present factual evidence to the court, during your hearing, which is consistent with existing laws to support your position.  If you are not a birth parent, you may be regarded as a person with a legitimate interest, which gives you standing to file.  This fact notwithstanding, your case will be resolved in accordance with laws dealing with third party litigants.  This type of case carries with it special rules that differ from the typical parental dispute. In order to protect the interest of the child, I suggest that you contact an experienced family lawyer in your area to set up a consultation.   This will provide an opportunity for you to discuss the matter in greater detail.  Most lawyers charge for consultations, therefore, you need to discuss the cost of a consultation before arranging a meeting.  Best of luck~