
Description	Balance at Beginning of Period		Additions			Deductions			Balance at End of Period

	(In millions)
Fiscal year 2021
Allowance for doubtful accounts	$	2	$	2	(1)	$	—	(1)	$	4
Sales return allowance	$	9	$	30	(2)	$	(22)	(4)	$	17
Deferred tax valuation allowance	$	621	$	107	(3)	$	—		$	728
Fiscal year 2020
Allowance for doubtful accounts	$	2	$	—	(1)	$	—	(1)	$	2
Sales return allowance	$	8	$	18	(2)	$	(17)	(4)	$	9
Deferred tax valuation allowance	$	562	$	59	(3)	$	—		$	621
Fiscal year 2019
Allowance for doubtful accounts	$	4	$	—	(1)	$	(2)	(1)	$	2
Sales return allowance	$	9	$	21	(2)	$	(22)	(4)	$	8
Deferred tax valuation allowance	$	469	$	93	(3)	$	—		$	562

(1)Additions represent allowance for doubtful accounts charged to expense and deductions represent amounts recorded as reduction to expense upon reassessment of allowance for doubtful accounts at period end.

(2)Represents allowance for sales returns estimated at the time revenue is recognized primarily based on historical return rates and is charged as a reduction to revenue.

(3)Represents change in valuation allowance primarily related to state and certain foreign deferred tax assets that management has determined not likely to be realized due, in part, to projections of future taxable income of the respective jurisdictions. Refer to Note 14 of the Notes to the Consolidated Financial Statements in Part IV, Item 15 of this Annual Report on Form 10-K for additional information.