I just purchased my first home

‌I am scheduled to meet with the seller next week at the real estate agency for a three-way meeting to sign the Land Use Transaction Permit agreement (or something like that).
Before that, is it okay to ask the agent to request the seller's (the homeowner's) certificates of national and local tax payment?
Does no one else ask for these things? Would I be considered a difficult client if I do?
Since this is my first time buying real estate, I don't know anything at all.
Also, I am buying a property that currently has a tenant (jeonse).
Should I also ask the agent to send me the current tenant's jeonse lease agreement?