Micro-library for typing and validating UK tax identifiers.

v9.0 - 05 Dec 23

• add support for Play 2.9 & Play 3.0, noting Play 2.8 is still supported
• update Scala 2.13 version
• update library dependencies
• add 'Change History' section to README

v8.3.0 - 23 May 22

• update broken sbt build

v8.1.0 - 06 May 22

• update library dependencies

Types are provided for many common tax identifiers, such as:

• Employment Reference (EmpRef)
• National Insurance Number (NINO)
• Unique Taxpayer References (UTR) - Self Assessment, Corporation Tax, Annual Tax on Enveloped Dwellings, Pension Scheme Administrator ID, Pension Scheme Practitioner ID, Alcohol Wholesale Registration Scheme,
• Unique Agent Reference (UAR)
• VAT Registration Number (VRN)
• Agents - Code, UserId, PAYE Reference, Agent Business

Reads and Writes have been provided for Play's JSON library for all identifiers, and format validation is present for some. JSON objects with multiple tax identifiers as properties can be serialized or deserialized to a TaxIds:

import play.api.libs.json._
import uk.gov.hmrc.domain._

implicit val format =  TaxIds.format(TaxIds.defaultSerialisableIds :_*)

val input =
        """{
          |"nino": "NM439088A",
          |"sautr": "some-sa-utr"
        }""".stripMargin
val taxIds = Json.parse(input).as[TaxIds]

taxIds.nino  // Some(NM439088A)
taxIds.saUtr // Some(some-sa-utr)
taxIds.ctUtr // None

Add the following to your SBT build:

libraryDependencies += "uk.gov.hmrc" %% "domain" % "[LIB VERSION]-play-[PLAY VERSION]"

for example

libraryDependencies += "uk.gov.hmrc" %% "domain" % "8.3.0-play-28"

Add the following to your SBT build:

libraryDependencies += "uk.gov.hmrc" %% "domain-play-[PLAY VERSION]" % "[LIB VERSION]"

for example

libraryDependencies += "uk.gov.hmrc" %% "domain-play-30" % "9.0.0"

Version 9.x.x add Play 2.9 and Play 3.0 support.

Version 8.x.x add Scala 2.13 support.

Version 7.x.x drop Play 2.6 and Play 2.7 support.

Version 6.x.x is Scala 2.12 only and add Play 2.8 support.

This code is open source software licensed under the Apache 2.0 License.