The Visa Number is NOT a required field, leave it blank (no one cares)
For the country of residence you can select thailand and fill your address in here IF you live here, OR you can use your home country address (again no one cares) 😛
There is indeed a 6 month METV <- multi-entry tourist visa (and you can get almost 9 months of stay out of it in 60 day increments 😮 )
BUT
you get it at the thai consulate in YOUR country before you come here (or a country that you can prove you have legal permanent residence in) <- meaning you can't go anywhere in S/E Asia and get that visa from a thai consulate nearby 😕
This is the choice you want on the eVisa online system when you select the Tourist visa
Is this the FIRST yearly extension you've ever gotten on the Non-O visa?
I ask because they put a paper in your passport when you apply for that first extension (when you got the under consideration stamp) that tells you when your first 90 day report is to be filed,
Go thru your passport page by page (look under the blue green stapled receipt etc) and see if you have the paper in there
If I was to guess I'd say you applied based on marriage / raising thai child and got a 30 day under consideration stamp that was ADDED to the expiration date of your Non-O 90 day stamp
Which from when the U.C stamp runs out seems like it might have expired around the 12th of June) 😉 <- they add the 30 days under consideration to the end of that stamp
So wait until you go get your extension on that 90 day Non-ED visa <- which is what you have right now and then look for that small paper once you get the extension. They will staple it into your passport
You don't even start doing 90 day reporting yet 😕
None of your time in thailand has been "countable" toward having to file a 90 day report
You ONLY start doing 90 day reporting when you're on a visa/extension for longer than 90 days
When you go to the immigration office and get your extension on this 90 day ED visa you have they will put a paper in your passport saying when your FIRST 90 day report is due