Hello there!

I am here to share some troubleshooting steps to ensure that your attachment file name won't be changed after attaching it to your expense transaction in QuickBooks Desktop Mac.

We can try closing and re-opening your QuickBooks for Mac to refresh the software. If the same thing happens, try to verify and rebuild your QuickBooks data. This will help us identify company file data issues as well as resolve those issues found. Follow along below to get this done right away.

1. Go to File, then select Utilities.
2. Click Verify Data, then OK to close all windows. If you see “Your data has failed the integrity check” you need to rebuild your file. If there are no problems with your data, you’re done.
3. Once your data is verified, you can now rebuild your company files, and refer to the next steps.
4. Navigate to the File menu, then choose Utilities.
5. Pick Rebuild Data, then select OK to close all windows.
6. QuickBooks will ask you to make a backup before rebuilding your company file, tap OK.
7. Once finished, hit OK.

Once you’ve verified your data, just rebuild your company file to fix any errors or data damage that's found. Here's how:

1. Go to File, then select Utilities.
2. Click Rebuild Data, then tap OK to close all windows.
3. QuickBooks will ask you to make a backup before rebuilding your company file, select OK. If you don’t want to do a backup, select Cancel to continue rebuilding your company file.
4. If you haven’t set up any backup preferences, QuickBooks will ask you to update them. Select Backup Preferences and edit as needed, then select OK.
5. When the backup's finished, select Show in Finder to locate the backup or hit OK if you’re done.
6. Once the rebuild's finished, press OK.

If the issue persists, I recommend reaching out to our Contact QuickBooks Desktop support. They are equipped with tools that can help you with your concern.

Moreover, I'm adding this helpful article as your reference in sending online invoices in QuickBooks Desktop: Send online invoices in QuickBooks Desktop.

Come back to this post if you have other questions about attaching files to your transactions in QuickBooks Desktop. I'll be here to lend a hand.