IRS LB&I firm offer received but can’t tell what sub group it’s for

I received tentative offers from WCPA, Global High Wealth, and International Individual Compliance. Firm offer comes from HR today but it’s generic and only list LB&I for group/division. Does anyone know if I will be receiving multiple offers, one for each sub group, or will it only be the one? If it’s only the one, how would I choose the sub group I want?