Hello,
Please check the condition types like VAT whether the rounding off rule is activated there or not in OBQ1
In rounding rule 'A', values are always rounded up
Also in tax procedure in OBQ3 condition type assign routine 17 under column "caltype"
This will round of the amount to nearest whole number.
Also refer OSS note 1857288.
Best Regards,
R.Brahmankar