How will my Covid extension be affected if I apply 30 days early at immigration in Thailand?

In Bangkok you will get 60 days from the day you apply, at least it was like that the last times that I went there. Today I went there again and only got an under consideration stamp. Not sure if they are more strict for now or if the reason is, that I already had a covid extension.

As you are working as a DJ, why not get the correct visa and work permit?

If you are changing from a tourist visa or visa-exempt to a covid extension, it goes from the day you apply.

If you are getting a further covid extension on top of another one, it gets added to your stamp.

Depending on the office you use they will let you apply once you have less than 30 days remaining. However some are less than 15, 7 and 3 days respectively. So it depends on the office you use, and how busy they are.

Also bare in mind that you'll likely get an under consideration stamp first and then have to return two, three or four weeks later, again, dependent on your office.

My advice is (predictably) to speak with your local immigration office and ask what they would offer and how it would play out.

totally depends on IF you're on a covid extension NOW or just a regular extension AND what office you deal with . Why would you go 30 days early? the current covid program runs until May 24th