It's good that you are concerned. Any page 2 closing disclosure fee paid in connection with the transaction -- regardless of who pays it -- must appear on the borrower's closing disclosure, including transfer taxes paid by the seller, real estate commissions paid by the seller or buyer, etc.
It's OK to omit the transfer tax paid by the seller from the loan estimate, but it must appear on the closing disclosure.
John S. Burnett
Fighting for Compliance since 1976
Bankers' Threads User #8