I use ADP to upload my invoices and at time the tax is a few pennies off.  I go by what ADP gives me and adjust Sage accordingly as the client will pay what ADP tells them to pay. Yes it's a pain as I don't always catch it but its really easy to fix and only takes a few seconds. It's not a big deal if you add or deduct pennies to your Invoices.  It will all match at the end of the year.  Just click on the Looking Glass beside the Tax amount in the bottom of your Invoice and adjust the number.  Yes you will see -0.01 on your Invoice but that is ok. I have to do the same when I enter my Payables.  My rounding and the suppliers are not always matching. (In your Payable you can fix your tax on each lines if you prefer but I don't think it's doable in the Receivable Invoices. This way you will not see the -0.01 on your Invoice).

there is no right way / wrong way, some systems calculate tax by line, some systems calculate tax using the subtotal

as long as they are consistent, both are acceptable

calculating by line is useful if you have multiple taxes, which may or may not apply to each line

if you are creating the original invoice, it won't matter, tax is what tax is

if you are recording an existing invoice (manual or other system), you'll should be able to adjust one of the line by a penny (+/-) so the tax and invoice total matches the existing invoice

I can adjust tax on a purchase invoice on the line however when using a sales invoice it does not show the tax total on the line so I cannot change it there to match the other programs used.  That is where my problem lies.  

The only place to adjust on the sales invoice is the tax entry and then the hst, not included message appears and I do not want to send an invoice with that message on it.  Any suggestions?

User2

In both Purchase and Sales invoices, you can select any line and hit Ctrl-Y to adjust the taxes on each line.  In Sales this will prevent the 0.01 not included message from showing on the sales tax area of the printed invoices.  If you want to use the menus, in Purchases it's on the Purchase menu, in Sales it's on the...you guessed it, Sales menu called Tax Summary for line.  In Purchases when you have more than two taxes in the file, you can double-click the Amount column to get to the same place.

Sage 50 does calculate tax per line and rounds off before adding it up.  Good or bad, right or wrong, that's the way it was originally programmed and the CRA is ok with it from what I understand, as long as it is consistent.

Thank you so much as I did not know about Ctrl-Y

will give this a try too :)