You've come to the right place, BrendaThere. Let me help you with applying a portion of delayed credit to a new invoice in QuickBooks Online (QBO).

We'll need to enter the exact amount of the delayed credit first. Let me guide you on how:

1. Click the + New Plus icon. 
2. Choose Delayed credit.
3. From the Customer dropdown, select the customer's name.
4. Enter the details, such as the date and the amount. You can create a custom credit service item so you can quickly add it to delayed credits as a single line item.
5. Press Save and close.

Once done, apply the delayed credit to the new invoice by following the steps below: 

1. Click the + New Plus icon.
2. Choose Invoice.
3. In the Customer dropdown, select the customer. This opens a window with all open transactions for the customer, including invoices and delayed credits. If you don't see this, tap the small arrow next to the invoice Balance Due.
4. Find the delayed credit and tap Add to add the credit as a line item to the invoice.
5. Fill out the rest of the invoice as needed.
6. Press Save and close.

To learn more about creating a credit memo or delayed credit to customers, you can check out this article: Create and apply credit memos or delayed credits in QuickBooks Online.

Moreover, you can refer to this article for more insights about receiving and recording invoice payments after applying the credits: Record invoice payments in QuickBooks Online.

We are still ready to back you up if you need more help with managing your invoices or QuickBooks-related concerns. We'll keep the thread open so you can comment back.

We'll need to enter the exact amount of the delayed credit first. Let me guide you on how:

1. Click the + New Plus icon. 
2. Choose Delayed credit.
3. From the Customer dropdown, select the customer's name.
4. Enter the details, such as the date and the amount. You can create a custom credit service item so you can quickly add it to delayed credits as a single line item.
5. Press Save and close.

Once done, apply the delayed credit to the new invoice by following the steps below: 

1. Click the + New Plus icon.
2. Choose Invoice.
3. In the Customer dropdown, select the customer. This opens a window with all open transactions for the customer, including invoices and delayed credits. If you don't see this, tap the small arrow next to the invoice Balance Due.
4. Find the delayed credit and tap Add to add the credit as a line item to the invoice.
5. Fill out the rest of the invoice as needed.
6. Press Save and close.

To learn more about creating a credit memo or delayed credit to customers, you can check out this article: Create and apply credit memos or delayed credits in QuickBooks Online.

Moreover, you can refer to this article for more insights about receiving and recording invoice payments after applying the credits: Record invoice payments in QuickBooks Online.

We are still ready to back you up if you need more help with managing your invoices or QuickBooks-related concerns. We'll keep the thread open so you can comment back.