How-to guides
Form and payslip walkthroughs — official links and a CTA back to take-home. More countries ship as research lands.
Form W-4How to fill out a W-4
How to fill out the 2026 IRS Form W-4 — filing status, multiple jobs, dependents ($2,200 / $500), and when to use the IRS withholding estimator.
Tax codeUK tax codes explained
What your PAYE tax code means — 1257L, BR, 0T, Scottish/Welsh letters, and emergency W1/M1/X — plus where to find it and how it affects take-home.
Tax codeHow to check your tax code
Where to see your UK tax code (HMRC online, app, payslip, notice), how to check Income Tax for 2026–27, and what to do if it looks wrong — official GOV.UK links only.
P11DWhat is a P11D?
What a P11D is, when employers report benefits in kind to HMRC, how payrolling changes things, and how to get your copy — employee explainer with GOV.UK links.
Income statementPAYG summary / income statement explained
Most PAYG payment summaries are now income statements in myGov. Where to find yours, what the figures mean, and why it differs from your payslip.
Individual tax returnHow to lodge a tax return in Australia
Who needs to lodge, what to gather, and how myTax and your income statement fit together for the 2025–26 return. Not a filing service.
Medicare levyMedicare levy and surcharge explained
What the 2% Medicare levy is, when the Medicare levy surcharge applies, and how each shows up on your tax return versus your payslip.
IR330How to fill out an IR330
Complete IRD’s IR330 tax code declaration for salary or wages — what it is, how to pick a code, non-notified rates, and when to update your employer.
TD1How to fill out a TD1
What the CRA TD1 form does, how to claim the basic personal amount, federal vs provincial forms, and what to enter with two jobs.
T2202T2202 tuition certificate explained
What the CRA T2202 tuition slip shows, when your school issues it, and how the amounts flow to Schedule 11 and line 32300.
T5008T5008 slip explained
What a CRA T5008 Statement of Securities Transactions reports, how individuals use it on a T1, box 20 ACB caution, and Quebec RL-18 notes.
T2125How to fill out a T2125
See who files CRA Form T2125, how income and expenses flow to your T1, and how self-employed pay differs from payday.
USCUSC rates 2025 vs 2026 (Ireland)
Compare Ireland’s Universal Social Charge standard rates and thresholds for 2025 and 2026 side by side — from Revenue’s official tables, plus exemption and reduced-rate notes.
PAYEPAYE in Ireland explained
How Ireland’s Pay As You Earn system deducts Income Tax, PRSI, USC (and LPT if applicable), how tax credits and your Tax Credit Certificate work in 2026, and where to check in myAccount.
PAYG withholdingPAYG withholding explained
How Australian PAYG withholding works for employees — TFN declaration, tax-free threshold, STP income statements, study loans, and when missing a TFN raises withholding.