Do I need to submit a TM30 form when returning to my Bangkok condo after domestic travel?

Your in Bangkok so have a word with your landlord and arrange for them to do the tm30 for you, also if the landlord is happy for you to do that then please ask him for the paperwork and the password to do it yourself

By law (2020) you do not have to re-register a tm30 if you are returning to a location within the check-in period of that location. So if your main address is registered with a null checkout date or a date still in the future, then there is no legal obligation to re-register. However, if you need to visit the immigration office for some reason, certain offices require a new TM30 after either/or international/domestic travel. I use CW and do a lot of domestic travel and still utilizing my original tm30.

Did your accommodation in Chiang Mai file a TM30 (they are supposed to)? If so, that is the last place the immigration know you are residing at. I think a new TM30 is required.

As others have said, check with your immigration office... but if you stayed at an hotel in Chiang Mai, I'm pretty sure you need to make a new one, since the hotel would have done one when you stayed there and that voids your previous one, meaning that you are now registered as being in Chiang Mai in the Immigration system.

Not required. The condo is your permanent place if residence

Does your original TM 30 show the expiration date or move out date if it's 1 year Move out date then I would say you do not need a revised tm 30

Check with your immigration office