If you are a linked account user you are able to change your default account from My Profile.
Your default account determines which account receipts emailed to email@example.com are uploaded too. We recommend that you set your default account as the account you use the most to claim expenses on.
To set your default account:
1. Click the cog in the top right corner.
2. Click My Profile.
3. Click Linked Accounts.
4. Select Make Default next to the account name you wish to be your default account.