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Packagist · #1918 most downloaded on Packagist
Client library for Avalara's AvaTax suite of business tax calculation and processing services. Uses the REST v2 API.
Last release 21 days ago
16 Sep 2026
Ships fairly regularly
a new release about every 4 weeks
Rarely documented
notes for 12 of the last 60 stable releases
Nothing withdrawn
no release was ever pulled
10 years old
104 releases · first in 2017
A new type of UserDefinedField is now available for usage in the response only, at the TaxDetail Level.
AvaTax API enhancements:
Added a Currency Rounding Rules API to configure per-currency tax rounding precision, with Avalara-provided system defaults.
AvaTax API enhancements:
• Added a Currency Rounding Rules API to configure per-currency tax rounding
precision, with Avalara-provided system defaults.
• Certificate exposure zones can now be filtered by name
• Adds SweetenedBeverageTax and BottledWater to Definitions TaxTypeGroups API
• Addws optional State and Local Jurisdiction filter parameters to the unitOfBasis
definitions endpoint and its supporting Unit, Integration Tests
• EcoNexus API documentation update.
• Documented three new Direct Pay Permit accrual AP statuses (Match, Undercharge,
Overcharge
• Optional skipTransactionValidation property for batch requests
One column per quarter.
Added customer ship-to state endpoints for retrieving, adding, and removing ship� to states.
AvaTax API enhancements:
• Added customer ship-to state endpoints for retrieving, adding, and removing ship�
to states.
• Improved retry user creation flow.
• Added new endpoint - GET /v2/companies/{companyId}/tax-types — TPS multi-tax
discovery.
• Improved validation and validation error messages pertaining to user-defined
fields.
• Added optional radius parameter (5, 10, 20, 30, 40 miles) to the
DeclareNexusByAddress API documentation.
Updated AvaTax to support validating individual VAT numbers
AvaTax API enhancements:
• Updated AvaTax to support validating individual VAT numbers
• Added new endpoints to support tax rule Jurisdiction selection before Tax Type
• Updated DynamicRuleModel to accept two new fields: ‘priority’ and ‘isDraft’
• Implemented new Custom Tax API to abstract implementation details from
custom tax API calls and remove dependency on UI hardcoding templates and
filters
• Added an API to list local exempt jurisdictions for a given exposure zone and tax
code
• Updated CertExpress Invitation API to prepopulate region and exempt reason
Added filtering support to ListCustomRules
AvaTax API enhancements:
• Added filtering support to ListCustomRules
• Added audit log reporting functionality for exporting, retrieving, and
downloading audit log reports
• Implemented ResolveTask endpoint for form type resolution
• Renamed EcoNexus API endpoint from GetEcoNexusThresholdStatuses to
GetEcoNexusThresholds
Added granularDutyDetails at the line detail level
AvaTax API enhancements
• Added granularDutyDetails at the line detail level
• Added VendorAdditionalInfo to VendorModel
• Adjusted default value for isLocked to false in ExportDocumentLineModel and
ReportParametersModel
• Made updates to Swagger documentation
Added support for new AvaTaxOnlyUserAdmin security role across users
AvaTax API enhancements:
• Added support for new AvaTaxOnlyUserAdmin security role across users
• Introduced a new GetCountryRate API endpoint to retrieve tax rates by country
• Implemented shipToStates mapping and validation for customer and vendor
create/update operations
• Added new CompanyUrl and CompanyDescription properties to company
• Enhanced multitax line detail report
• Added new API to retrieve VAT numbers for a company
• Fixed minor bug with Swagger UI startup
Added BusinessIdentificationNo and VatNumber filtering support
AvaTax API enhancements:
• Added BusinessIdentificationNo and VatNumber filtering support
• Fixed response body casing for permission category and security role assignment
endpoints
• Modified Jurisdiction APIs to use new rate types
• Provided access to account subscriptions for newly created
ReturnsOnlyCompanyAdmin and ReturnsOnlyCompany user roles
• Fixed minor bug with the ListCountries API
Enhance Transaction Builder to include Add category at line level in TransactionBuilder #247
SDK Enhancement:
Implemented various improvements to Item-related APIs
AvaTax API enhancements:
Created new API: ListPermissionCategories
AvaTax API enhancements:
• Created new API: ListPermissionCategories
• Updated the Definition APIs to filter based on Service entitlement
• Fixed an issue with the allow-custom-content header
• Added support for Tanning and Firearms NexusTaxTypeGroups in TaxTypes and
TaxSubTypes APIs
Fixed bug related to duplicate Contacts
AvaTax API enhancements:
• Fixed bug related to duplicate Contacts
• Enabled IsRemoteSeller option while adding or updating nexus if account has MRS
and MRSComplianceManager subscriptions
• Fixed bug related to updating the Purchase Order number associated with an
already existing exemption certificate
• Updated CreateCompanies API to allow creating a company with an already used
companyCode if previous company is deleted
• Fixed bug related to fetching a deleted company without returning an error
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