Help with EAD renewal

[ctoan]

Hi

I'm self filing my EAD renewal and needed help filling out form I-765.

Question 11: Dates of prior EAD.
Do they expect the dates of all previous EAD applications or just the last one?

Question 12: Date of Last Entry into the U.S.
Question 13: Place of Last Entry into the U.S.
I recently went on a short trip to Canada and I didn't receive a new I-94 on my entry back by road via Buffalo,NY. Prior to that, I entered the US on H1B via SFO.
How should I answer this one? SFO or Buffalo,NY?

I live in California. Where do I mail the I-765 application?

Thanks!