Steam account requirements
Your account must be in good standing, without any trade nor community bans. Please also take note of any Steam temporary trade restrictions which may occur because of recent account changes.
To trade skins your account needs to be linked to a phone number via the Steam Guard Mobile Authenticator, which can be downloaded from the Steam website.
Make sure you have added a correct Trade URL on SkinCashier so we can see your inventory.
And that your inventory and profile privacy settings are set on "Public"