ProductPrice on Checkout differs from ProductPage

I just started setting up a shop for food and drinks see:
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After hours of strugling with the TAX setup I finally succeeded (I think). I have setup two TAX rates rules (VAT is called BTW in the Netherlands): 6% for food and 19% for non-food or alcoholic drinks. Customers who buy are all in the Netherlands. Edited an existing food product and applied the tax rule 6%. There is everything ok.

Also on the product page where it says EUR 1,50 incl.TAX. But on the Checkout page the price is EUR 1,51? Seems to be a rounding issue. Any solution? Since TAX/VAT here has to be paid over the total amount of each order.

Thank you. I have version 1.4.5
Tried to install 1.4.7 but then get an error -1- Can't copy selected file.

Manual Upload?

Simply Uploading didn't work
All my work (menu items) lost but database still intact.

Thank you very much! Your advice seems to work. Will be doing some more testing

"please look in the file adminsitrator/components/com_hikashop/classes/currency.php in the function addTax near the end of the file. Could you try to remove the line:
$price->price_value = round($price->price_value,$round);

and see if the price is correct after that?"