Do I need to complete my 90-day reporting and TM30 after returning to Thailand on a NON-O visa?

𝗜’𝗺 𝗴𝗼𝗶𝗻𝗴 𝘁𝗼 𝗘𝗻𝗴𝗹𝗮𝗻𝗱 𝗳𝗿𝗼𝗺 𝗦𝗲𝗽𝘁𝗲𝗺𝗯𝗲𝗿 𝟭𝟮𝘁𝗵 𝘁𝗼 𝗢𝗰𝘁𝗼𝗯𝗲𝗿 𝟭𝟯𝘁𝗵.

Make sure you bought a re-entry permit

𝗠𝘆 𝟵𝟬 𝗱𝗮𝘆 𝗿𝗲𝗽𝗼𝗿𝘁𝗶𝗻𝗴 𝗶𝘀 𝗱𝘂𝗲 𝗼𝗻 𝗢𝗰𝘁𝗼𝗯𝗲𝗿 𝟭𝟮𝘁𝗵.

You only do a 90 day report if you've been in the country the 90 days before your report is due. You are leaving a month before the due date so you don't report

𝗗𝗼 𝗜 𝘀𝘁𝗶𝗹𝗹 𝗱𝗼 𝘁𝗵𝗶𝘀 𝗼𝗿 𝗱𝗼𝗲𝘀 𝘁𝗵𝗲 𝗧𝗺𝟴 𝗿𝗲 𝗲𝗻𝘁𝗿𝘆 𝗮𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗰𝗮𝗹𝗹𝘆 𝗸𝗶𝗰𝗸𝘀𝘁𝗮𝗿𝘁 𝗮𝗻𝗼𝘁𝗵𝗲𝗿 𝟵𝟬 𝗱𝗮𝘆𝘀?

The TM8 re-entry permit doesn't do anything regarding a 90 day report, that re-entry permit lets you exit/re-enter without cancelling your extension.

Your NEXT 90 day report is due 89 days from the date you stamp back in to thailand. So if you say you're comin' back on the 13th of Oct, your next 90 day report would be due Jan 10th

𝗔𝗹𝘀𝗼, 𝗱𝗼𝗲𝘀 𝗮𝗻𝗼𝘁𝗵𝗲𝗿 𝗧𝗠𝟯𝟬 𝗵𝗮𝘃𝗲 𝘁𝗼 𝗯𝗲 𝗰𝗼𝗺𝗽𝗹𝗲𝘁𝗲𝗱 𝗼𝗻 𝗺𝘆 𝗿𝗲𝘁𝘂𝗿𝗻 𝗶𝗳 𝗜’𝗺 𝗰𝗼𝗺𝗶𝗻𝗴 𝗯𝗮𝗰𝗸 𝘁𝗼 𝘁𝗵𝗲 𝘀𝗮𝗺𝗲 𝗮𝗱𝗱𝗿𝗲𝘀𝘀.

That is between you and the policy your immigration office has about TM30's.

Some offices say if you're coming back to your primary address (the one you use when you got your extension and file 90 day reports) that you don't need to re-file. BUT some say you do, so check with your office when you come back just in case you need to re-file a TM30