Change in DVAT 4-Dealer Name

Hi,

I have applied yesterday for TIN no. of client and TIN no. generated instantly as per process but later on I observed that name of dealer-propreitor concern has been little bit wrongly mentioned in DVAT 4 as YA instead of AY at the end of business name.

I filled in immediately DVAT form no.7. What exactly should be done I am not sure. please guide whether this DVAT 7 will take immediate effect as the registration certificate is yet to be generated or I have to again apply later on.