think I figured out what was happening re: optional taxjar buttons to add/delete taxjar
I changed 2 lines of code from the readme.txt file (OPTIONAL - Admin section) - that add the buttons to the admin/orders.php file
Changed:
<a type="submit" class="btn btn-sm bg-success" href="<?php echo $_SERVER['PHP_SELF']."?page=1&oID=".$oID."&action=edit&tj=1";?>">Add to Taxjar</a>
<a type="submit" class="btn btn-sm bg-danger" href="<?php echo $_SERVER['PHP_SELF']."?page=1&oID=".$oID."&action=edit&tj=2";?>">Delete from TaxJar</a>
TO:
<a type="submit" class="btn btn-sm bg-success" href="<?php echo $_SERVER['PHP_SELF']."?cmd=orders&page=1&oID=".$oID."&action=edit&tj=1";?>">Add to Taxjar</a>
<a type="submit" class="btn btn-sm bg-danger" href="<?php echo $_SERVER['PHP_SELF']."?cmd=orders&page=1&oID=".$oID."&action=edit&tj=2";?>">Delete from TaxJar</a>
I just hard coded what I believe if known as the basename??? into the url so that it would return to the same page.
I tested the Delete button only. Got the message indicating transaction was removed under the buttons and verified records was deleted in taxjar.