Once the estate lawyer receives the signed orders from the court, the lawyer will need to obtain a taxpayer identification number for the estate. This can be done online at the IRS website through the EIN Assistant.
Note that if the probate judge requires that the Personal Representative/Executor post a bond, then the estate lawyer will need to work with the Personal Representative/Executor to secure the bond before the probate estate can be opened.
Probate Checklist - 8 Steps to Opening a Probate Estate