When does H1B Validity expire??

hi,

I am planning to go back to india by leaving my present company. Will my H1B expire…What will be its status once I leave my present employer…

What is the way to keep it active…

H1B petition will expire on its validity end date which is mentioned in the approval notice. If are just going to India for a break, you may come back to US on that H1B, provided that company supports you and your petition is still valid. If you leave your present employer, the petition will be unusable. However, you may use that petition to file a cap-exempt petition with another employer.