Carry back losses

TinyTax handles losses carried forward - if you have losses from previous years, you can enter these and they'll offset against your current profits.

Carrying losses back (to claim a refund from a previous year's return) isn't something we support. It requires supplementary page CT600A and amending a prior return, which is beyond the scope of what we do - we're focused on keeping things simple for straightforward filings.

For carry back claims, HMRC's own forms or a full-featured accounting package would be the way to go.