90-days stay permit
Like any other US visa, a K-1 visa has certain eligibility criteria to apply. You must check to fulfill all such requirements before applying for a K-1 visa.
The USCIS will approve the form I-485
Step 1: Filing form I-129F by the sponsor/US national
Step 2: Visa Interview
Step 3: Entering the US
The sponsored fiancé(e) can work in the US on a K-1 visa by applying for permission to work by filing Form I-765 to the USCIS.