Questions Regarding Form 4810

The instructions say this:
Send your request to the Internal Revenue Service Center where you filed the returns for which you are requesting prompt assessment.

Since the returns were e-filed, do you send them to the service center where a paper return would have been sent? If so, if two of the decedent's 1040's were sent with payment and one without, what do you do? Do you have to do multiple 4810s?

Also, we need to include the initial estate 1041. A paper return for it is filed at a different service center that the decedent 1040's. Do you file a separate 4810 for the 1041 as well?

Lastly, when you file the 4810 does the IRS acknowledge their receipt. If they do not assess any tax in the 18 months, do you ever hear from them?

"Lastly, when you file the 4810 does the IRS acknowledge their receipt. "

Yes, a closing letter is sent to executor. I have been sending 4the 810 to same place I send 1041 and Form 56.

So if 1041 was e-filed, you send the 4810 to where the 1041 would have been mailed, correct?

Also, in your experience, does filing 4810 for decedent and fiduciary income tax "invite" an audit?

you send the 4810 to where the 1041 would have been mailed, correct?

Correct.

Also, in your experience, does filing 4810 for decedent and fiduciary income tax "invite" an audit?

No. Some believe its malpractice not to file a 4810.

Thank your very much for your help!