My husband became a USC last year and filed the i130 for his mother on 04/01/2021. This was the only thing filed at that time. She is staying with us in Florida. The I130 has been approved as of 03/23/2022, what is our next step? One guide states we should file something with NVC. wait for a letter of account creation, upload all the documents and wait for a bill to pay the filing fee and AOS online. Another says we need to file the i485 to USCIS with the fee of $1225 ($1140 + 85) and all the paperwork. Which is the correct process?