Exhibit 99.1 								Date: February 21, 2019

Form 4 List of Reporting Owners and Signature Page

Name of designated filer: WARBURG PINCUS & CO.

Other joint filers: Warburg Pincus Private Equity XI, L.P., WPXI Finance, LP,
Warburg Pincus XI Partners, L.P., WPXI GP, L.P., Warburg Pincus XI, L.P., WP
Global LLC, Warburg Pincus Partners II, L.P., Warburg Pincus Partners GP LLC,
Warburg Pincus LLC, Charles R. Kaye, Joseph P. Landy

Address for each joint filer is: c/o Warburg Pincus & Co., 450 Lexington Avenue,
New York, New York 10017

Issuer Name and Ticker or Trading Symbol: Avalara, Inc. (AVLR)

					WARBURG PINCUS PRIVATE EQUITY XI, L.P.
						BY:	WARBURG PINCUS XI, L.P., ITS GENERAL PARTNER
						BY:	WP GLOBAL LLC, ITS GENERAL PARTNER
						BY:	WARBURG PINCUS PARTNERS II, L.P., ITS MANAGING
							MEMBER
						BY:	WARBURG PINCUS PARTNERS GP LLC, ITS GENERAL
							PARTNER
						BY:	WARBURG PINCUS & CO., ITS MANAGING MEMBER
					/s/ ROBERT B. KNAUSS
					---------------------------------
					By: Robert B. Knauss
					Title: Partner

					WPXI FINANCE, LP
						BY:	WPXI GP, L.P., ITS MANAGING GENERAL PARTNER
						BY:	WARBURG PINCUS PRIVATE EQUITY XI, L.P., ITS
							GENERAL PARTNER
						BY:	WARBURG PINCUS XI, L.P., ITS GENERAL PARTNER
						BY:	WP GLOBAL LLC, ITS GENERAL PARTNER
						BY:	WARBURG PINCUS PARTNERS II, L.P., ITS MANAGING
							MEMBER
						BY:	WARBURG PINCUS PARTNERS GP LLC, ITS GENERAL
							PARTNER
						BY:	WARBURG PINCUS & CO., ITS MANAGING MEMBER
					/s/ ROBERT B. KNAUSS
					---------------------------------
					By: Robert B. Knauss
					Title: Partner








					WARBURG PINCUS XI PARTNERS, L.P.
						BY:	WARBURG PINCUS XI, L.P., ITS GENERAL PARTNER
						BY:	WP GLOBAL LLC, ITS GENERAL PARTNER
						BY:	WARBURG PINCUS PARTNERS II, L.P., ITS MANAGING
							MEMBER
						BY:	WARBURG PINCUS PARTNERS GP LLC, ITS GENERAL
							PARTNER
						BY:	WARBURG PINCUS & CO., ITS MANAGING MEMBER
					/s/ ROBERT B. KNAUSS
					---------------------------------
					By: Robert B. Knauss
					Title: Partner

					WPXI GP, L.P.
						BY:	WARBURG PINCUS PRIVATE EQUITY XI, L.P., ITS
							GENERAL PARTNER
						BY:	WARBURG PINCUS XI, L.P., ITS GENERAL PARTNER
						BY:	WP GLOBAL LLC, ITS GENERAL PARTNER
						BY:	WARBURG PINCUS PARTNERS II, L.P., ITS MANAGING
							MEMBER
						BY:	WARBURG PINCUS PARTNERS GP LLC, ITS GENERAL
							PARTNER
						BY:	WARBURG PINCUS & CO., ITS MANAGING MEMBER
					/s/ ROBERT B. KNAUSS
					---------------------------------
					By: Robert B. Knauss
					Title: Partner

					WARBURG PINCUS XI, L.P.
						BY:	WP GLOBAL LLC, ITS GENERAL PARTNER
						BY:	WARBURG PINCUS PARTNERS II, L.P., ITS MANAGING
							MEMBER
						BY:	WARBURG PINCUS PARTNERS GP LLC, ITS GENERAL
							PARTNER
						BY:	WARBURG PINCUS & CO., ITS MANAGING MEMBER
					/s/ ROBERT B. KNAUSS
					---------------------------------
					By: Robert B. Knauss
					Title: Partner










					WP GLOBAL LLC
						BY:	WARBURG PINCUS PARTNERS II, L.P., ITS MANAGING
							MEMBER
						BY:	WARBURG PINCUS PARTNERS GP LLC, ITS GENERAL
							PARTNER
						BY:	WARBURG PINCUS & CO., ITS MANAGING MEMBER
					/s/ ROBERT B. KNAUSS
					---------------------------------
					By: Robert B. Knauss
					Title: Partner

					WARBURG PINCUS PARTNERS II, L.P.
						BY:	WARBURG PINCUS PARTNERS GP LLC, ITS GENERAL
							PARTNER
						BY:	WARBURG PINCUS & CO., ITS MANAGING MEMBER
					/s/ ROBERT B. KNAUSS
					---------------------------------
					By: Robert B. Knauss
					Title: Partner

					WARBURG PINCUS PARTNERS GP LLC
						BY:	WARBURG PINCUS & CO., ITS MANAGING MEMBER
					/s/ ROBERT B. KNAUSS
					---------------------------------
					By: Robert B. Knauss
					Title: Partner

					WARBURG PINCUS LLC
					/s/ ROBERT B. KNAUSS
					---------------------------------
					By: Robert B. Knauss
					Title: Managing Director

					CHARLES R. KAYE
					/s/ ROBERT B. KNAUSS
					---------------------------------
					Name: Charles R. Kaye
					By: Robert B. Knauss, Attorney-in-Fact

					JOSEPH P. LANDY
					/s/ ROBERT B. KNAUSS
					---------------------------------
					Name: Joseph P. Landy
					By: Robert B. Knauss, Attorney-in-Fact