Install the below packages from the package manager
ibus
m17n-db
ibus-m17n
m17n-lib
Then run ibus-daemon -rdx in the terminal. Then EN icon appears on the the right side of the taskbar. Right click on it and select preferences.
Then ibus preferences window will appear click on the 3 dots to expand the list of inputs
select phonetic(m17n)
left click on the EN icon then menu appears select Tamil-phonetic(m17n) the start typing enjoy
