Incorrect tax base amount

Hello,

Can someone please share from where and how the tax base amount is getting picked up, as for some documents the tax base amount is coming incorrectly. In the below example, tax amount has been calculated as 368.80, on base amount of 245866, whereas amount charged to vendor is only 98946. I want to know how this 245866 has come up as base amount. Please see the below screen shots.

Regards,

Vineet