So I found this discussion helpful:
https://community.quickbase.com/quickbase/topics/button-to-redirect-to-current-formBasically, the quickbase addition to your url to redirect once the record is generated is "
&rdr=" & URLEncode($URL OF PARENT RECORD). In this case, the user is on the parent record before they are redirected to the new add form, so you need to grab the url here, before you are redirected, the fast and dirty way is using javascript:
window.location.href. _This literally just grabs the url exactly as it is on the page. Set it to a variable, and then send it along. Or, you can use Quickbase, doing the same type of url you did for the original url, pull in the data to send you back to the correct parent record. You will need to play around with how it redirects, and when.
Also, if you are trying to create a new child record for the parent, then your url should state
&_fid_(parent) = [Record id#], because the child record has not yet been created, you are creating it on the new page, and the
_fid_(parent) (also by default called Related (whatever the table is called) on the child table) is being linked to the related parent record.