There are 2 court appointed representatives, do both need to sign the tax return?

[Carrie-14-0]

My brother passed away 9/1/2018, my sister and I are administrators. Do both of us need to sign the tax return?  Also do I need to send a certified/copy of the appointment with a seal, or is a copy sufficient?

[MichaelL1 · Accepted solution]

It is OK for only one of you to sign the return.

Send in copies only to IRS, do not give them original documents (it is not needed).

Sorry for the loss of your brother.