Is Form 1040 Only for US Citizens or Also for Resident Aliens?
Learn who must file Form 1040—US citizens and resident aliens—and when non-residents must use Form 1040-NR for US tax returns.
Is a TIN the Same as an EIN? Understanding Tax Identification Numbers
Learn the key differences between TIN (Taxpayer Identification Number) and EIN (Employer Identification Number) for tax purposes in the U.S.