"Taxes" Report Does Not Have "Net Sales", "Total Sales" Columns

[sucralose]

I am using POS Pro, not currently selling online.

Frustrating problem:

All I want to do is add two columns, "Net Sales" and "Total Sales" to this report (plz see attached). Shopify does not let me modify this report. If I try to create a new report, I don't see an option for breaking the tax out by rate (13% and 5%) as in this standard report.

Any solutions for this?

Thanks in advance, I'm banging my head against the wall.