Invoice on hold due to Tax Variance Rate

Hi All,
Request your help in resolving this below error.

There was a PO with x lines for a supplier and the goods have been received and the ionvoice raised for thi PO. But we are getting 2 lines as on hold due to Tax Rate Variance account that has been created for these some lines.
How can we resolve this error of the Tax Rate Variance (TRV) though the PO has all the related tax calculated and the invoice for other lines except for some of the x lines.
Note: The PO has been closed.
Your help is highly appreciated as we nearing the due date for payment.