Yes, that is exactly what I KNOW. I purchased shares in my TD account on July 12th for .205. Now when I look at the Historical Quotes and Splits window on my TD app, the quotes have already been converted to reflect the split. Here is what is now listed for July 12th:
LAST - .0705 OPEN - .0793 HIGH - .0793 LOW - .0647
Since I paid .205 on July 12th, it would be the HIGH if the historical quotes were not already reflecting the split.