It looks like $16,000 invested in Vanguard Total Stock Market pays a lower amount of tax ($48) than the higher yielding Vanguard Total International ($72 in tax minus $12 foreign tax credit).
When I divide each dividend by each reinvestment share price, I get:
VTIAX has 3% dividends, VTSAX has 2% dividends.
Qualified dividends are taxed 15%, so that's VTIAX paying 0.45% tax and VTSAX paying 0.3% tax
On VTIAX you'd pay $16,000 x 0.0045 = $72 tax, minus $12 foreign tax credit, or $60 in taxes
On VTSAX you'd pay $16,000 x 0.003 = $48 in taxes.