The following information is regarding TuneCore's Publishing Administration service
Yes! However, you must have executed agreements in place that states you have administrative rights over the publishing share of these writers you represent. If you possess these agreements then you would need to create an account per writer that you wish to represent. You would then list your tax information, or your entity’s tax information, on each account since you would be the payee of the publishing share
Please be advised that your publishing entity must be registered with a PRO (Performance Rights Organization) and/or mechanical rights society like: BMI, ASCAP, SESAC in the US or PRS/MCPS, APRA/AMCOS, SIAE, GEMA, etc. overseas, as a publishing entity in order to successfully execute this properly.