Alsup Consulting sometimes performs services for which it receives payment at the conclusion of the engagement, up to six months after services commence. Alsup recognizes service revenue for financial reporting purposes when the services are performed. For tax purposes, revenue is reported when fees are collected. Service revenue, collections, and pretax accounting income for 20202023 are as follows:

	Service Revenue			Collections			Pretax Accounting Income
2020	$	676,000		$	636,000		$	202,000
2021		766,000			794,000			276,000
2022		726,000			718,000			244,000
2023		732,000			736,000			216,000

There are no differences between accounting income and taxable income other than the temporary difference described above. The enacted tax rate for each year is 25%. (Hint: You will find it helpful to prepare a schedule that shows the balances in service revenue receivable at December 31, 20202023.) Required: 1. to 3. Prepare the appropriate journal entries to record Alsup's 2021 income taxes, 2022 income taxes and 2023 income taxes.