Where do you track markup on parts

I'd be glad to help you track your markup in QuickBooks Online (QBO), mapmap.

QBO automatically set a default account once you turn on markups.

In the Default markup percentage field, set the percentage markup to calculate the sales price of items that both have a cost and a sales price. Keep in mind that you don't need to enter a %sign anymore. You'll see the effect of the default markup percentage when you create inventory part, non-inventory part, service and other charge items.  

Once you enter the item's cost, QuickBooks automatically calculates the sales price and enters it in the Sales price field.

For future reference, here's an article that you can browse through on how to track your sales accurately: Enter and manage expenses in QuickBooks Online.

Should you need any further queries about markups, let us know by dropping a comment below. We're always here anytime. Stay safe.