Answer:
Accumulated Amortization $ 0.2 million (debit)
Amortization Expense $ 0.2 million (credit)
Explanation:
Amortization of Intangible Asset = Cost / Useful Life
                           = $15,300,000 / 9
                           = $1,700,000
The Amortization has been $1,700,000 since 2009
2013
Amortization Charge = $1,700,000
Revised useful life is 6 years instead of 9.
Therefore, Adjust the amortization at beginning as if revision happened at beginning of the year
New Amortization Charge = Carrying Amount as at 2012/ Remaining Useful life
                      = ($15,300,000 - ($1,700,000×4))/6
                      = $8,500,000/6
                      = $1,416,667
Adjusting Journal
Accumulated Amortization $283,333 (debit)
Amortization Expense $283,333 (credit)