Covid Extension in Chang Watthana

May I ask to clear up if I got everything correct:

- I prepared TM.30 just in case they ask for it

- 90 day report: currently it's my ~70th day.

- Chang Watthana is not asking for embassy letters, correct?

- Photo and relevant copies I do there again

What is not clear to me now:

What do I cross on the covid 19 extension form?

Or do I use "other" and write *something*?

What are the others doing who extend in Chang Watthana?

Edit: Sorry, and do I need to postpone my flight for the *maybe new* Visa time range or dont they check this?

Thank you for the help! I appreciate it a lot