Chemical poisoning -- Helium: Introduction. Chemical poisoning -- Helium: Helium is a chemical used mainly in helium balloons, neon signs and diving gas. The gas is sometimes misused as an inhalant. Ingestion and other exposures to the chemical can cause various symptoms.hemical poisoning -- Helium: Helium is a chemical used mainly in helium balloons, neon signs and diving gas.
You are required to make estimated tax payments if your North Carolina income tax liability, after credits and tax withheld, is $1,000 or more. Use Form NC-40 to make estimated tax payments. Your estimated tax is the amount of income tax you expect to owe, minus the tax you expect to have withheld plus any tax credits. Estimate your tax carefully to avoid having to pay a large balance and to avoid paying interest for underpayment of estimated income tax. For calendar year filers, estimated payments are due April 15, June 15, September 15 of the taxable year and January 15 of the following year.
Taxpayers who estimate they will owe $200 or more in tax on income not subject to withholding must pay estimated tax. When the annual income tax return is filed, the prepaid estimated tax is credited against the actual tax liability.