"The tallies cannot be certified until the totals are known from all the precincts (or enough that it won't matter)."
Yes, that's true. The media has their own war room and keeps tracks of voting, district by district.
I'm not avoiding anything on purpose, Truthy. Vote tabulations are a fairly complicated matter and can differ from state to state especially with so many more people voting absentee these days.
I expect Trump will be making a lot of noise about "winning" but none of that matters. It's the final count that wins the day, at least as far as the popular vote. What Trump is really going to be watching is how popular Biden is the the electoral rich battleground states. That where he's going to aim his attack if he sees an opening.
These are very unusual times, Truthy. We don't know to what extremes Trump will go to invalidate the results if he doesn't win. Which means nobody has all he answers.