Hey @KMarciano7, thank you for posting in our Community!
Thanks for your question! HubSpot's native quoting tool doesn’t currently support adding a markup percentage directly to line items. However, a workaround could be to manually calculate the markup and include it in the unit price before adding the item to the quote.
Alternatively, a custom-coded workflow could potentially automate this process within HubSpot. To our top experts, @Lucila-Andimol, @franksteiner79@TomM2 any recommendations to @KMarciano7?