@Thomas *******
I assume you mean the TDAC. The Thailand Digital Arrival Card. I did that within the 3 days prior to my arrival. Iy is easy to do. That is not related to a visa or visa exemption. Yes I agree it is a bit confusing with all the different visas. But once you find the visa that suits your circumstances, it should be easier. My point was it was clear to immigration that I intended to stay 90 days, which was greater than my 60 day visa exemption stamp, but I was not questioned about my intentions regarding extension of this period up to 90 days.