Determine if you should file an application to receive an individual taxpayer identification number (ITIN).
Determine if you should file a claim for part of a refund that was jointly applied toward a spouse’s past due debt.
Determine if any of the debt canceled on your principal residence is required to be included as income on your federal tax return.
Determine if you’re required to make estimated tax payments for 2019 or if you meet an exception.
Determine if you're required to pay highway use tax on a highway motor vehicle used on any public highway in the United States.
Determine if you may claim exemption from federal income tax withholding on Form W-4, Employee's Withholding Certificate.