The Form I-485 is needed for an Adjustment of Status after a K1 Visa holder has married in the United States. This is used to apply to adjust your status to that of a permanent resident of the United States.
This is the form needed for an Adjustment of Status for a K1 Visa holder. The cost is $985. (Add $85 biometric fee for a total of $1070, where applicable. See the form instructions for payment details.) You must make your check payable to Department of Homeland Security. Form I-485 and Form I-140 may be filed together at the USCIS Dallas Lockbox facility.