QB Issue Resolution:

That’s a great question! There are a few differences between the desktop and the online version! Let’s see if we can’t get this cleared up for you!

To find the 1099 setup page, we’re going to go to Vendors > Prepare 1099s. From here we’re going to have all the options that we need to get those 1099s ready! We’ll be able to Select Vendors and Assign Accounts! When assigning the accounts, you can even assign multiple accounts if needed!

I’ve included some screenshots to help you with this! Please let me know if you have any other questions!
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Resolution for Issue 'How do I adjust the 1099 settings for vendors and accounts in QUICKBOOKS ONLINE? (The answers I’m seeing all relate to the Windows version.)' available: Yes (Solved).
Source: Intuit Community forum.

How do I adjust the 1099 settings for vendors and accounts in QUICKBOOKS ONLINE? (The answers I’m seeing all relate to the Windows version.): this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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