Find and open it

Open Activity and choose the transaction. Use search and the filters if needed. The detail sheet shows its amount, type, category, account and note.

Edit

Choose Edit, adjust the fields shown and choose Save changes. The app does not offer every field for every transaction type; transfer amount and type, for example, are not edited like income and expenses.

Delete

Choose Delete, review Delete this transaction?, then confirm Delete. The account balance is adjusted. Only confirm after checking you selected the right record.

Check the result

Return to Activity and Home. If a save or delete reports a connection failure, check the current record and balance before repeating it.