Getting a tax I.D. number

[RWG1950]

A customer that held her assets in a revocable trust has died. She had been using her social security # for trust tax reporting.
Now that the grantor has died, the trust becomes irrevocable & (I assume) will need its own tax I.D. #
In view of the IRS shutdown, what would be the best way to get this new tax I.D. number ?
Thanks for comments.

[TAXNJ]

Maybe try this:

https://www.irs.gov/businesses/small-businesses-self-employed/apply-for-an-employer-identification-number-ein-online