I just started my business and deposited 10,000 as startup capital that can be uses to buy products so i can resell them again, where do I add this 10,000 ?

I've got some steps we can perform to record the capital in QuickBooks Online (QBO), shawn-shawntec-c. 

We can track adding capital by setting up an equity account to track money that owners invest or draw from a business. Then, we don’t need to record the investment if you’ve connected your bank account. Just categorise the transaction associated with your deposits. If you don't automatically import your bank transactions, record a deposit into your equity account instead. Here's how: 

1. Click the + New Plus icon. 
2. Select Bank deposit.
3. From the Account drop-down menu, choose the bank account you're depositing the money into.
4. Enter the Date you deposited the money.
5. In the Add funds to this deposit section, enter the name of the investor in the Received from field.
6. Select the appropriate equity account from the drop-down list in the Account field.
7. Choose a Payment method.
8. Enter the investment amount in the Amount field.
9. Press Save and close.

After you receive investment, you may need to record paying yourself, partners, or co-owners back at a later date. This is called a capital disbursement. Here's an article you can refer to for more details on how to record paying back an investment. 

Feel free to visit our Getting Started page for more insights about running your business in QuickBooks.

I want to make sure everything is taken care of for you, please let me know how it goes or if you have any other issues or concerns. Just leave a comment below and I'll get back to you. Take care always.