How can I update a Vendor address without changing the address on previous checks sent to the Vendor? If I update, I can no longer see where a previous check was sent.

It's great to see you here, mmcallister.

I acknowledge you'd like to update the vendor's address in QuickBooks Online (QBO) while keeping the previous address on older transactions.

Please be informed that any changes made to the vendor's address in QBO automatically update this detail in both existing and future transactions.

As a workaround, you can manually enter the previous address on the affected checks to preserve the old address for those specific transactions.

We're continuously striving to improve our software. It would be beneficial to submit your feedback to our product development team. They can evaluate the suggested option and might incorporate it into future enhancements.

Here's how:

1. Go to the Gear icon at the top.
2. Select Feedback.
3. Enter your comments or product suggestions. Then select Next to submit feedback.

You can check this article for additional reference: Change the payee address listed on checks in QuickBooks Online.

Moreover, check out this article to learn how to generate a report showing all payments made to vendors: Run a report with vendor totals.

We appreciate your proactive approach in seeking solutions and understanding the features, mmcallister. If you have any other questions or need further assistance, please comment below. We're here to help ensure you have the best possible experience with our software.

I find this ridiculous.  I should have a choice - update all or update future transactions.

Update all makes sense if correcting a typo or adding a Suite#. But if the vendor has moved, or the contact name has changed, I should be able to preserve the correct information on past transactions.
The work around you suggest is tedious. I will submit to the development team.