	March 31, 2020			March 31, 2019
Gross carrying amount	$	75,212		$	59,782
Accumulated amortization		(38,208	)		(21,927	)
Net capitalized software costs	$	37,004		$	37,855

During the year ended March 31, 2020, we recorded $3,198 of impairments related to the write down of previously capitalized software development costs for certain technology that will no longer be utilized in any future software solutions. During the year ended March 31, 2019, we retired $13,453 of fully amortized capitalized software costs that are no longer being utilized by our client base. Amortization expense related to capitalized software costs was $17,085, $11,338, and $6,518 for the years ended March 31, 2020, 2019, and 2018, respectively, and is recorded as cost of revenue in the consolidated statements of net income and comprehensive income.

The following table presents the remaining estimated amortization of capitalized software costs as of March 31, 2020. The estimated amortization is comprised of (i) amortization of released products and (ii) the expected amortization for products that are not yet available for sale based on their estimated economic lives and projected general release dates.

For the year ended March 31,
2021	$	22,000
2022		10,300
2023		4,500
2024		204
Total	$	37,004