Tolerance issue in Invoice created through Web Services

when trying to do the invoices through the web services in Procurement below is the error message coming up-

CAUSE . . . . The tax amount shown is incorrect. The tax amount should be equal to the taxable amount multiplied by the tax rate. RESOLUTION. . Enter the correct tax amount. Refer to the Tax Rules file (F0022) to determine how tax is calculated. Note: For VAT and GST (Canadian) related tax explanations refer to the Tax Rules file (F0022) to determine how tolerance is calculated.

Please help how to resolve it