On July $1$ of year $1,$ Riverside Corporation $($RC$),$ a calendar$-$year taxpayer, acquired the assets of another business in a taxable acquisition. When the purchase price was allocated to the assets purchased, RC determined it had purchased $$2,040,000$ of goodwill for both book and tax purposes. At the end of year $1,$ RC determined that the goodwill had not been impaired during the year. In year $2,$ however, RC concluded that $$405,000$ of the goodwill had been impaired and wrote down the goodwill by $$405,000$ for book purposes.

Required:

What book$$tax difference associated with its goodwill should RC report in year $1?$ Is it favorable or unfavorable? Is it permanent or temporary?

What book$$tax difference associated with its goodwill should RC report in year $2?$ Is it favorable or unfavorable? Is it permanent or temporary?