Service tax

go to "aces.gov.in" 

then login with your ID & password

you will find "Reg" i.e. registration tab on the screen

click "Reg" tab

A droplist will appear on the screen

you will find an item as "view" in droplist

click on "View"

Two under mentioned options will appear on the screen

i) Latest ST-1

ii) Latest ST-2

click on "Latest ST-1" 

you can see your ST-1 now.

Now take Printout of it.

Its Very Simple..........