Is my tax return final? What if I've missed something off?
Pressing submit on a tax return can be scary. It feels like it's final.
Except it's not. If you discover something is wrong, you can still file an amendment. You can do this with untied.
All you need to do is tick the box "file as amendment" on the last screen before clicking "I'm ready, file it!". Note that on some devices you may need to scroll to reveal this box.
This will update your return and adjust any tax you may need to pay (which may be reflected in your tax code for the following year).