My new customer invoices are being recorded in a AR sub-account (allowance for doubtful accounts) and I need it to record in the standard AR account? how do I change?

Hello, bobbrilon.

I have some information when handling multiple AR accounts in QuickBooks Online. 

You mentioned something about converting from the Desktop version. QuickBooks Online uses the last default A/R account before you converted (or when you selected it during conversion).

This is likely the reason why the system uses the sub-account for new invoices. 

Unlike the Desktop version, we're unable to change the default AR account. What you can do is to merge both the parent and the subaccount.

This will record new invoices under the merged account. Here's how: 

Make the subaccount as a regular account:

1. Go to your Chart of Accounts.
2. Find and open the subaccount by clicking the arrow icon beside View register. 
3. Uncheck Is sub-account.
4. Click Save and close. 

Merge both accounts:

1. Find the subaccount you don't want to keep. 
2. Click the arrow icon beside View register. 
3. Change the name and set it the same as the standard AR account.
4. Click Save and close. 
5. On the confirmation window, click Yes. 

For more details about merging accounts, you can check this article: Merge duplicate accounts, customers, and vendors in QuickBooks Online.

In addition, QuickBooks Online can only handle one AR account. If you have multiple accounts, I recommend reading this article for a guide: How to group Accounts Receivable or Accounts Payable account types.

Do you need help navigating around QuickBooks Online? You can learn the ropes by checking our guides in the articles list page. 

I'm here to answer any other concerns you might have. Simply use this thread for your new questions and I'll be right there with you.