I filled in foreign tax credit table 1116, but why it didnot go into my total tax due amount?

@gswu , cannot comment / help -- need lot more info.

(a) Are you US person ( Citizen/GreenCard/Resident for Tax purposes )?

(b)  Roughly what is your world income ( US sourced income Plus Foreign income ) and Foreign income ?  TurboTax uses this as a ratio to allocate  US taxes to the foreign source income 

(c) Which country is this income from ?  ( There must be a Tax Treaty in effect and also there may be  controlling clauses in addition to the double taxation clause ).

(d) What type of income -- Passive  such as  ( interest/dividend/ capital gain  etc. etc. ) or  HTKO or  active ( self-employment  etc. ) ?

(e) Is your Tax home in the USA or are you abroad  ( and if so which country ) ?

I will circle back once  hear from you