Does Trustee Status Dictate Application?

So I recently bought 4 suppressors. One of which was in stock so I went ahead and filled out all the information, fingerprints, etc.

I want to have 3 trustees on the trust, but the 3rd individual was not able to get his fingerprints scanned (worn down fingerprints from years of work).

I sent the paperwork off to be reviewed and approved, but I’m wondering if the lack of completion from the 3rd person will hold up the process? Do they have to have everything completed before the ATF starts the review process? Or will they start it regardless since I’m the trust owner?

If yes, how can I remove the 3rd trustee? Who do I send the addendums to?

Thanks!