I feel like this situation is missing a piece, but I am very uncertain how to handle/go about doing this:

The pretax financial income (or loss) figures for company are as follows:

2017 80,000

2018 (160,000)

2019 (380,000)

2020 120,000

2021 100,000

pretax finanicial income (or loss) and taxable income (loss) were the same for all years involved. Assume a 25% tax rate for 2015 and 2016 and a 20% tax rate for the remaining years.

Prepare j/e for the years 2017-2021 to record income tax expense and the effects of the net operating loss carryforwards. all income and losses relate to normal operaitons (no valuation account is deemed necessary)

I am confused on why it mentions the years 2015-2016 tax rate and I am also uncertain how to process 2018 and beyond. For 2017 I came up with:

Income tax expense DR 16,000

Income taxes payable CR 16,000