space + tab transforme to solo tab

[AntoineMau]

I search a while and I coun't find my answer.
tab size is 4.
. are space
_ are tab
when a do in code :
int._a;
it stay as 1 space and 1 tab but i want that vscode transforme N spaces and 1 tab to tabs.
exemple:
int............_a;
into:
int____a;
when a press tab