Earned income tax, like all other income taxes, is a self-reporting tax. Your annual income cannot be pre-determined by the Tax Officer. Pennsylvania employers are required by law to withhold the tax. If your employer does not withhold the tax, you must make quarterly estimate payments at the rate established by the taxing jurisdiction(s) where you live when you earn your income.
Penalty, interest and Act 192 costs are statutory and accrue on the unpaid tax balance due.