An H1B visa is usually granted for three years and may additionally be renewed for another term of three years. If you have a specialised set of abilities and desire to work in the United States. There are also exceptions to extend the visa for even more years depending on the type of work being performed.
If you ever quit/change or terminated by the organisation that sponsored your visa, you will either have to find a new employer and complete new paperwork, follow for a update of status, or be deported and have to return to your domestic country. There is a grace length of 60 days to find a new company.
If you are deported, your organisation will be accountable for the fees of your return transportation unless you voluntarily left/quit the organisation. In addition, if after your deportation, you come to be hired through a US organization again, you can apply for a fresh H1B visa again but go through the complete process as a new applicant.
Step 1: Finding an H1B Sponsor
Step 2: Employer Submits Labor Conditions Approval (LCA)
Step 3: Employer Submits Form I-129
Step 4: Applicant Completes Application at a US Embassy or Consulate