Clarification regarding composite registration

yes pan

The threshold limit for registration is 40 lakhs in case of goods and 20 lakhs for supply of services. Aggregate Turnover is to be calculated all india basis for the person having same PAN.

Composition scheme is available to manufacturers/traders of goods and restaurant business only ( however service component can be upto 10% or Rs 5 lakhs whichever is higher) The Threshold limit for composition is Rs.1.5 crores calculated on all india basis for person having same PAN. If you have more than one registration on the same PAN then all registration has to pay tax under composition scheme only.

Note from 1st april 2019, for supplier of service composition scheme is for first 50 lakhs only at 6%

Yes it based on pan you have to apply regular or composition scheme every State