Your bank has your "TIN" already if you get any interest from your account. If so you pay tax (15%) and the bank uses your passport number as identification for the revenue office.
The Revenue Department knows about you if you have a bank account here. You get interest, the bank take out 15% tax on that, as Tax-ID or TIN they use your passport number.
Yep, you are right... and I didn't say that it will be possible for sure, no? But... since the idea is to bring more tourists inside (and keep them longer) it would make sense to offer the extension... otherwise the Immigration would lose a lot of money. So... the rumours are, that the extension will be available also for the 60 day exempt. But hey... we are still in Thailand... things can be totally different tomorrow... 😁
It might happen that the next visa waiver measures will become effective soon (no guarantee)... that would give you a 60 day stamp, most probably extendable once for 30 days.