Do ERPNext support these issues?

Help me answer!

Import PickTickets, Details, Comments, Addresses
Import ASN Case and Case details
Upload receipt confirmations on Putaway
Upload close of ROs
Reopen closed RO lines
Upload all changes to inventory with reason codes
Upload change of QC state of inventory
Upload Ship confirmations to Host
Upload PickTickets and Lines when shipped

You should add an explanation of each of those items. What’s “ASN Case”? RO?

I assume you want to move your existing “system” into ERPNext, am I right?

→ Every type of document that is existent in ERPNext (or added by customization) can be batch uploaded using the “Data import” tool. You’ll prepare some excel or CVS files to do the job.

It might require some customizations though to match your existing data and processes.

Can you get more specific what your intention is?