Liability on transfer of business: joint and several tax responsibility and transferee must amend registration promptly. Liability arises on transfer of a business: the transferor and transferee are jointly and severally liable for tax, interest and penalty due up to the time of transfer, including amounts determined after transfer to the extent they relate to the pre transfer period. The transferee is liable for tax on supplies from the date of transfer and, if registered, must apply within the prescribed time to amend the certificate of registration.