Hi ELC-Leo
I'm not sure about your Inc Tax Amount column. Inc usually stands for Inclusive, so I think this should show 1.00 2.00 etc.
Most rounding issues are with GST inclusive numbers like $5.00. Divide this by 11 to get 0.45454545 and MYOB struggles.
This is what I suggest to see if MYOB can import correctly.
Fix up this invoice onscreen to what you want the amount column to show. Next export this invoice only. Then import the export, without changing anything. If it succeeds, analyse the export file and copy that to the letter. If it fails and gives you the same result as the original, then there is no answer but to use something else.
Regards
Gavin