I am having an issue with taxes (i just started doing sandbox testing). when i submit orders as a single line item the total is correct but it messes up the tax and product price. if i submit it as individual items it keeps the correct product and shipping costs but tax is modified and makes the total purchase price off. i can provide screen shots and anything else that would be needed.

edit:
I found my problem, i was taxing a line item and that was throwing it off.