Consultant
35 Points
Joined December 2010
Hi Jyoti,
SD means Service tax. Previously before the introduction of ACES Software, it is called as an ST (means Service tax). Before the ACES, the STC Number will be PAN + alpha-code(ST)+ Numeric-code(001). After ACES the following minor changes happened
The registration number will be same as the current 15-
digit format with minor change such as
For-PAN based Assessees
1-10 digits – PAN of the Assessee
11-12– (SD – Service Tax)
13-15–Systems generated alphanumeric serial
number
Regards
Prasad G.K