State Administration of Taxation
Finance v2.3.6
Does 个人所得税 work on iPhone Duo?
Mostly. 个人所得税 2.3.6 is built with the iOS 27.0 SDK, so it fills most of iPhone Duo's inner display but leaves some space unused.
At a glance
- Inner display (7.6″)
- Partly adapted
- Outer display (5.4″)
- Works normally
- Built with
- iOS 27.0 SDK
- Version 2.3.6, read Nov 1, 2026
- iPad version
- No
- Phone-only layout today
- Latest version
- v2.3.6
- Oct 31, 2026
- Duo in release notes
- Not yet
About 个人所得税
个人所得税 is made by State Administration of Taxation and first came out on the App Store in October 2018. It has 1,195 ratings on the US App Store, averaging 1.9 stars. Version 2.3.6 came out on Oct 31, 2026 and needs iOS 15.0 or later. It's free to download.
From its App Store listing:
个人所得税APP由国家税务总局主办，是为贯彻落实党中央、国务院提出的个人所得税综合与分类相结合的税制改革要求，保障全国自然人纳税人及时享受税改红利而推出的一款移动办税工具。主要支持个人所得税综合所得年度汇算等纳税申报、专项附加扣除信息填报、收入纳税明细查询、异议申诉、涉税证明材料上传、委托代理等涉税业务办理，并配套提供在线咨询、热点问题、帮助中心等功能。
On the inner display
Built with the iOS 27 SDK, the app extends across most of the inner display, but some areas stay empty. It's usable, just not polished.
In Split View
iPhone Duo is the first iPhone that can show two apps side by side, and every app takes part — including 个人所得税. Open it on the inner display, then add a second app next to it. You can save the pair and come back to it later.
Duo-specific features
None confirmed yet. Duo-specific features include side toolbars, layouts that react to the fold, and content on the outer display while the app is open inside.
Evidence & history
App build,
Version 2.3.6 is built with the iOS 27.0 SDK
Apple gives apps built with the iOS 27.0 SDK more of the inner display, with some space left over.
- : Not confirmed yet → Black bars — built with the iOS 26.2 SDK
- : Black bars → Partly adapted — built with the iOS 27.0 SDK
Latest release notes
Version 2.3.6 · Oct 31, 2026
1.优化部分功能的用户体验。
Questions
Does 个人所得税 work on iPhone Duo?
Mostly. 个人所得税 2.3.6 is built with the iOS 27.0 SDK, so it fills most of iPhone Duo's inner display but leaves some space unused.
Does 个人所得税 work on the outer display?
Yes. iPhone Duo's 5.4-inch outer display behaves like a regular iPhone screen, so every iPhone app works there as usual.
Can I use 个人所得税 in Split View on iPhone Duo?
Yes. On iPhone Duo every app can be placed side by side with another app on the inner display — developers don't need to opt in. How comfortable it feels at half width depends on the app's layout.
Why does 个人所得税 have black bars on iPhone Duo?
Apps built with the iOS 26 SDK or earlier run in a phone-sized window on the inner display, and iOS 27 builds can still leave some space empty. The bars disappear once the developer rebuilds the app with the iOS 27.1 SDK — you only need to update the app.
When will 个人所得税 fill iPhone Duo's inner display?
When its developer releases an update built with the iOS 27.1 SDK or later. We read the SDK of every new version of 个人所得税 within about a day of its release and update this page.
What can I do about the black bars until then?
Use 个人所得税 on the outer display, where it works like on any iPhone, or put it in Split View next to another app on the inner display so less of the screen goes unused.