Purchases: Increase/decrease tax up or down by a cent

[AndrewKShields]

I frequently have to adjust the GST up or down 1 cent to match suppliers bills (invoices).  What about a small UP/DOWN icon after the GST line on a Purchases - Edit Item BILL to adjust by 1 cent only?

"GST rounding adjustment in bill"

[AndrewStephen]

This would be useful and would save me 30+ minutes each week.

Currently I need to add a misc item for rounding on many invoices each week.  Wasn't an issue with v19 but the way AR2018.4 rounds would justify this feature being added.  Its usally the way AR2018 rounds on the line item that affect the GST.