I dont know what notes I'm playing most of the time either, you dont need to ,its 100% irrelevant. I know which notes (string and fret place not the note name) sound good in which order and thats about it. I know absolutely zero about music theory but that hasn't stopped me writing kick ass song after kick ass song over 15 years of playing guitar.
I'm of the opinion if you dont need it why bother with it.
Just tune to the tuning, do what the tab tells you to do, put your fingers where the tab tells you, its simple.
It doesn't matter what tuning you're in, if the tab has a 5 on the first and second strings and 0's on all other strings you put a finger on the first and second strings in the fith fret and strum all 6 strings, if it has a 9 on the 3rd string and a 8 on the 4th string you put fingers(any fingers that feel comfortable) on them strings in them frets and strum how many times the numbers appear.
EXACTLY the same as normal tab, regardless of the tunings! You dont need to transpose anything!