How do I add an additional percentage cost to labour hours for supplies and materials

Hi whipstar1-hotmai,

Welcome to the QuickBooks Online community family! It sounds like you're talking about tracking your project labor costs in the program. I'll be happy to share more on this. 

The Projects feature in QuickBooks Online Plus enables you to add workers' hourly wages and employer taxes to calculate the hourly time costs. This is done through the Hourly cost rates option. Here's how.

1. Select the Projects menu.
2. Select Hourly cost rate. This opens the hourly cost rate window.
3. Select Add next to an employee's name.
4. Select the calculator icon to pull up the hourly cost calculator.
5. Add your worker’s hourly wage and employer taxes (per hour).
6. You can also enter their additional employer taxes, workers’ comp, and overhead.
7. When you’re done, select Add and then Save to add their hourly cost rate.
8. Repeat these steps for each worker.
9. Select Done.

And voila! You also have the flexibility to go back and edit your entries where necessary. Here's an article for your reference: Track income, costs, and profitability by project

I hope this helps! Feel free to stop by if you have other questions. 

how can i add additional cost in QuickBooks enterprise edition. for example i am making an invoice. i add one inventory product in the invoice and now i want to add little more cost on this invoice. remember this is cost and it will not added i the subtotal and i don't want to show on printed invoice. 

Hi mirzaishfaq, 

Welcome to the QuickBooks Community! I can see how incorporating additional costs into the inventory items can be useful for you in keeping track of expenses more accurately. I'm happy to let you know that this can be achieved by subscribing to the Advanced Inventory feature for QuickBooks Enterprise. I can help explain how to set this up. 

Advance Inventory in QuickBooks Desktop Enterprise allows you to set up items such as landed costs to increase the costs of goods of a given item. Here's how to enable this feature: 

• From the Edit menu, select Preferences.
• On the left pane, choose Items & Inventory then go to the Company Preferences tab.
• Check the Inventory and Purchase Orders are Active box.
• Select the Advanced Inventory Settings button. If the button is greyed out even though you have purchased the feature, you will need to sync license data online so that QuickBooks recognizes it.

You can find more information about Advanced Inventory from the following articles: Turn on Advanced Inventory and Set up Advanced Inventory. Once this is enabled, you can set up landed costs to increase the cost of inventory items. This option can be found within the the Advanced Inventory Settings: 

• From the Edit menu, navigate to Preferences.
• Find Items and Inventory, then click Company Preferences.
• Select Advanced Inventory Settings.
• Click the Landed costs tab, then Setup landed cost account.

You can also find articles that may be useful to your situation in product on price levels and markup.

I hope this helps. Please let me know if there's anything else I can assist with!