Move tax amount to inline component

[dukenv0307]

Explanation of Change

Fixed Issues

$ #90673
PROPOSAL:

Tests

Precondition:

Run Onyx.merge('betas', ['newManualExpenseFlow']); in console.
Enable Rules, Tags and Taxes in workspace settings.
Set Billable default to Billable.

1. Create a tag in Tags settings.
2. Go to staging.new.expensify.com
3. Go to workspace chat.
4. Click + > Create expense > Manual.
5. Verify that the tax amount input should be inline
6. Enter the invalid amount
7. Create expense
8. Verify the error message is shown

• Verify that no errors appear in the JS console

Offline tests

QA Steps

• Verify that no errors appear in the JS console

PR Author Checklist

• I linked the correct issue in the ### Fixed Issues section above
• I wrote clear testing steps that cover the changes made in this PR
  • I added steps for local testing in the Tests section
  • I added steps for the expected offline behavior in the Offline steps section
  • I added steps for Staging and/or Production testing in the QA steps section
  • I added steps to cover failure scenarios (i.e. verify an input displays the correct error message if the entered data is not correct)
  • I turned off my network connection and tested it while offline to ensure it matches the expected behavior (i.e. verify the default avatar icon is displayed if app is offline)
  • I tested this PR with a High Traffic account against the staging or production API to ensure there are no regressions (e.g. long loading states that impact usability).
• I included screenshots or videos for tests on all platforms
• I ran the tests on all platforms & verified they passed on:
  • Android: Native
  • Android: mWeb Chrome
  • iOS: Native
  • iOS: mWeb Safari
  • MacOS: Chrome / Safari
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  • I verified that any new or modified comments were clear, correct English, and explained "why" the code was doing something instead of only explaining "what" the code was doing.
  • I verified any copy / text shown in the product is localized by adding it to src/languages/* files and using the translation method
  • I verified all numbers, amounts, dates and phone numbers shown in the product are using the localization methods
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  • I verified the JSDocs style guidelines (in STYLE.md) were followed
• If a new code pattern is added I verified it was agreed to be used by multiple Expensify engineers
• I followed the guidelines as stated in the Review Guidelines
• I tested other components that can be impacted by my changes (i.e. if the PR modifies a shared library or component like Avatar, I verified the components using Avatar are working as expected)
• I verified all code is DRY (the PR doesn't include any logic written more than once, with the exception of tests)
• I verified any variables that can be defined as constants (ie. in CONST.ts or at the top of the file that uses the constant) are defined as such
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  • The file has a description of what it does and/or why is needed at the top of the file if the code is not self explanatory
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  • A similar style doesn't already exist
  • The style can't be created with an existing StyleUtils function (i.e. StyleUtils.getBackgroundAndBorderStyle(theme.componentBG))
• If new assets were added or existing ones were modified, I verified that:
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• If the PR modifies code that runs when editing or sending messages, I tested and verified there is no unexpected behavior for all supported markdown - URLs, single line code, code blocks, quotes, headings, bold, strikethrough, and italic.
• If the PR modifies a generic component, I tested and verified that those changes do not break usages of that component in the rest of the App (i.e. if a shared library or component like Avatar is modified, I verified that Avatar is working as expected in all cases)
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• If the PR modifies the UI (e.g. new buttons, new UI components, changing the padding/spacing/sizing, moving components, etc) or modifies the form input styles:
  • I verified that all the inputs inside a form are aligned with each other.
  • I added Design label and/or tagged @Expensify/design so the design team can review the changes.
• If a new page is added, I verified it's using the ScrollView component to make it scrollable when more elements are added to the page.
• I added unit tests for any new feature or bug fix in this PR to help automatically prevent regressions in this user flow.
• If the main branch was merged into this PR after a review, I tested again and verified the outcome was still expected according to the Test steps.

Screenshots/Videos

Android: Native

Android: mWeb Chrome

iOS: Native

iOS: mWeb Safari

MacOS: Chrome / Safari

Screen.Recording.2026-05-29.at.17.03.02.mov

[melvin-bot]

@ChavdaSachin Please copy/paste the Reviewer Checklist from here into a new comment on this PR and complete it. If you have the K2 extension, you can simply click: [this button]

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[chatgpt-codex-connector]

Keep inline tax amount synced after recalculation

When the tax rate, amount, or currency changes while this inline field is mounted, TaxController writes the recalculated tax amount back to the transaction, but NumberWithSymbolForm only uses value to initialize its internal currentNumber and does not update when the prop changes. In the new manual expense flow this leaves the visible tax amount stale after selecting a different tax rate (or changing the expense amount/currency), even though the draft now contains a different tax amount, so the user can submit a value that is not what the field displays. Force a remount or explicitly sync the input when taxAmountInput/currency changes.

Useful? React with 👍 / 👎.

[codecov]

Codecov Report

❌ Looks like you've decreased code coverage for some files. Please write tests to increase, or at least maintain, the existing level of code coverage. See our documentation here for how to interpret this table.

Files with missing lines	Coverage Δ
...ionListFooter/fieldGroups/ClassificationFields.tsx	50.00% <ø> (ø)
src/libs/TransactionUtils/index.ts	87.58% <100.00%> (+0.05%)	⬆️
src/pages/iou/MoneyRequestAmountForm.tsx	85.71% <100.00%> (-0.34%)	⬇️
...stConfirmationList/hooks/useFormErrorManagement.ts	89.58% <50.00%> (-1.73%)	⬇️
src/libs/MoneyRequestUtils.ts	90.00% <0.00%> (-2.65%)	⬇️
...onfirmationList/hooks/useConfirmationValidation.ts	81.42% <16.66%> (-6.08%)	⬇️
...oneyRequestConfirmationList/sections/TaxFields.tsx	78.57% <68.18%> (-8.10%)	⬇️
... and 10 files with indirect coverage changes

[dukenv0307]

Let's wait for #92061 to be merged first

[trjExpensify]

Part of the in-line input editing 👍