Apply to Dentist, Physical Therapist, Physical Therapist Assistant and more! US work visas, like the H1B and L1, need sponsorship from a US employer.Here's how the process works, and how much it costs. Apply to Dentist, Engineer, Physical Therapist and more! File both forms at the location specified for the other application or petition. For example, if you are filing Form I-765 with Form I-539 or Form I-485. No need to call it out in cover letter? Will you now or in the future require sponsorship to work in the United States? Jefferson works with outside immigration counsel to prepare and submit H-1B petitions. Typical preparation and processing time for a new petition is 180 days.