Hi Kimberly, Welcome
Having had a Tarago and other van/people movers..removing the rear seats is not an issue, I believe it is only if your altering the type of seats or adding seating where there were never any seats etc that affect rego and require inspection.
So if your just removing them I see no issue at all
Hope I am right if not I am sure others will rectify the information for you..
Good to have another "Coasty" on=board
KAA