You can just tell them the address where you are staying of the condo I doubt they will ask more or if it’s rented etc and I don’t think it matters there’s no law against renting a condo on TR visa.
It needs to state that you’re able to work remotely in Thailand and that you will not engage in employment in Thailand with any Thai employer or business
Anonymous participant well when did you file for the LLC? It’s a show on the paperwork the filing date and if it’s this year, then you couldn’t file taxes yet, I would probably just write them a letter of explanation.