For CPAs and tax preparers
We send each client their own checklist and keep reminding them by text and email until every document is in, then hand you a weekly list of who is still missing what.
“Why are clients so bad at sending documents?”
a thread on r/taxpros, on Redditevery season go to emails asking for the same W-2 three times.
Practice software asks your clients to log in. Most will not. We go to them, by text.