Foreign-Source Income for Vanguard VXUS

I am still confused about what to enter for foreign-source income for Vanguard.

I have had 3 funds in Vanguard in 2021  (VTI, VXUS and VWLUX) out of which only VXUX had "Foreign tax withheld-Various"

"VXUS Dividends+distributions"=$8000,

"total dividends+distributions"=16000,

Box 1a (Total Ordinary Dividends in 1099-DIV)=$15000

Box 1b (Total Capital Gain distributions in 1099-DIV)=$1000


Vanguard tax form did not provide foreign source income, but provided below:

FOREIGN SOURCE INCOME PERCENTAGES
Fgn Source Inc Tot 90.34% Fgn Source Inc Qual 64.50%

 

Turbo Tax "Foreign-Source Income" screen says : You reported $16000 of total iincome from Vanguard. How much of this income was from foreign countries?

 

Question:

Which of the following should I provide for Foreign source income?

Option 1)  (Total Dividends+distributions*90.34%) = (16000*90.34/100) or

Option 2) (Box 1a*90.34%) = (15000*90.34/100) or 

Option 3) (VXUX Dividends+distributions*90.34%) = (8000*90.34/100) ?

 

Thanks a lot!