After the 18th constitutional amendment in Constitution of Islamic Republic of Pakistan collection of sales tax on services came under the domain of provinces, latter provincial revenue authorities / boards were constituted in provinces.
Now the service providers are required to be registered with relevant provincial revenue authority in the jurisdiction of which services are rendered. If a business providing services in two or more province then registration with all relevant provincial revenue
Punjab Revenue Authority (PRA)
KPK Revenue Authority (KPRA)
Sindh Revenue Board (SRB)
Balochistan Revenue Authority (BRA)
Islamabad Capital Territory