Revenues (Tables)

12 Months Ended

Dec. 31, 2021

Revenue From Contract With Customer [Abstract]

The following table disaggregates revenue generated within the United States (“U.S.”) from revenue generated from customers outside of the U.S. Revenue for transaction tax compliance in the U.S. is further disaggregated based on the solutions or services purchased by customers. Total revenues consisted of the following (in thousands):

	For the Year Ended December 31,
	2021		2020		2019
Revenue (U.S.):
Subscription and returns
Tax calculations	$	349,430	$	257,680	$	203,584
Tax returns and compliance management		233,420		178,318		127,815
Interest income on funds held from customers		769		829		3,213
Total subscription and returns		583,619		436,827		334,612
Professional services		59,514		32,474		24,399
Total revenue (U.S.)		643,133		469,301		359,011
Total revenue (non-U.S.)		55,844		31,268		23,410
Total revenue	$	698,977	$	500,569	$	382,421

Summary of Activity Impacting Contract Liabilities

A summary of the activity impacting the contract liabilities during the years ended December 31, 2021, and 2020 is presented below (in thousands):

	For the Year Ended December 31,
	2021			2020
Contract liabilities:
Balance beginning of period	$	10,134		$	5,197
Contract liabilities transferred to deferred revenue		(21,255	)		(11,151	)
Addition to contract liabilities		18,039			16,088
Balance end of period	$	6,918		$	10,134

Summary of Activity Impacting Deferred Revenue

A summary of the activity impacting deferred revenue balances during the years ended December 31, 2021, and 2020 is presented below (in thousands):

	For the Year Ended December 31,
	2021			2020
Deferred revenue:
Balance beginning of period	$	209,690		$	161,241
Revenue recognized		(698,977	)		(500,569	)
Additional amounts deferred		772,242			549,018
Balance end of period	$	282,955		$	209,690

Summary of Activity Impacting Deferred Commissions

A summary of the activity impacting the deferred commissions during the years ended December 31, 2021, and 2020 is presented below (in thousands):

	For the Year Ended December 31,
	2021			2020
Deferred commissions:
Balance beginning of period	$	50,870		$	38,416
Additional commissions deferred		32,721			23,935
Amortization of deferred commissions		(15,072	)		(11,481	)
Balance end of period	$	68,519		$	50,870