Answer:
D. Year 6
Step-by-step explanation:
if the average gross revenue exceeding $5 million corporation can use the actual method.
for computation of average annual gross receipts at least three preceeding years of gross receipts should be considered over the years.
the gross receipts for year 6 = ($6 + $4.5 + $5)
Average annual gross receipls for year 6
= ($6 + $4.5 + $5)/3
= $5.16 million
Therefore, The corporation would have first require to use the actual method in year 6.