Seen as im living at the mrs home, i believe there hasnt been one done since i arrived march 5th, will i need a tm30 done?

Can it be filled today even though ive been there since the 5th?

Can it be done on the app if its the first time?

I dont have to extend untile the 3rd of april, but would like to get the 60 days and make sure there are no cock ups.

Whether you need to complete submit a TM30 form or not depends upon upon the office your report to. Have your wife complete it and state you arrived at her house on the date it is completed.

If can be done on the app or online after your wife registers to do it. Website: https://extranet.immigration.go.th/fn24online/ Links for  the app are here. https://www.immigration.go.th/content/tm30_mobile_service

You could apply for the 60 day extension at any time now.