@jerry 

You can review the > E-File > e-file support tools > View e-file to see what is actually sent.  You do have to go all the way thru "validate" to generate this info, just back out before you actually send the return.

Not sure who "they" might be, but the IRS did suggest exactly the same process for dealing with F 1099-K issues.  So I don't think the an entry on line 24z is likely to provoke a letter.  YMMV