I stayed in a hotel for three weeks and now moved to my thai partners house and I need to file for a 30 day extension on my tourist visa. We didn’t file the paperwork needed for staying in her home so what will happen when i go for the extension?

Anyone had done covid visa extension for the first time recently in Phuket Town immigration? Apparently in Changwattana the FIRST time you do Covid Visa Extension it starts from the day you apply and not when your current visa expires. I know every immigration has different rules and wondering how is it in Phuket Town immigration? Thank you guys!:)