Customer & Supplier same person. How to manage?

Thank you for sharing your first post, @dhanushan6553-gm. Let me walk you through how to manage your sales and purchases.

In your case, you can use the billable expense feature to track your entries. When you record billable expenses your client can reimburse the amount when they receive their invoice. 

To get started, ensure that the feature is enabled and you're subscribed to QuickBooks Online (QBO) Plus or Advanced. To turn on the billable expense tracking:

1. Sign in to your QBO account.
2. Go to the Gear icon, then select Account and settings.
3. Click on Expenses.
4. From the Bills and expenses section, select Edit ✎.
5. Turn on the following:
   • Show Items table on expense and purchase forms
   • Track expenses and items by customer.
   • Make expenses and items billable.
6. (Optional) Set up the following:
   • Markup rate
   • Billable expense tracking
   • Sales tax charge
7. Bill payment terms.
8. Hit Save, then Done.

After that, you're now ready to enter billable expenses and add them to your invoices.

You can also run through our self-help articles for more hints while handling your income and expenses in the future:

• Add, organise, and send invoices
• Enter expenses, pay bills, and manage suppliers

Please let me know if you have any other questions while recording your transactions in QBO. I'm more than happy to help you again. Have a good one!