Joint assessment is the option that benefits most couples. Under joint assessment you are chargeable to tax on your combined total income.
This is the option that is applied when you notify us that you are married or in a civil partnership. This does not prevent you from choosing the other options of separate assessment or separate treatment.
You can update your civil status and request joint assessment through ‘Manage My Record’ or ‘My Profile’ in
myAccount. You can also upload any supporting documentation. Your spouse will be required to confirm the request by signing into myAccount and confirming the status update.