SAP B1 in Canada is it possible to turn of AP Invoice Tax rounding

[shivjipatel]

We have a client in Canada, using TAX defined as 13%, but when the users enters the actual TAX amount on Vendor Invoice, when we post the invoice the document amount changes when posted due to the system rounding the TAX

[Felipe_Lima]

Is your scenario similar to the described here? https://me.sap.com/notes/3379849/E

[JesperB1]

Hello, 
Please check this KBA which describes how tax amounts are distributed on lines. 3379849 - How is the Tax Rounding Difference allocated to line item row levels?

Please note that for a document it is the document total tax amount that takes precedent should there be a difference to the total of the lines. Hence the logic described in the KBA. 

I hope that helps, 

Jesper