Regulations for section 1446 require a
worksheet for installment payments of section 1446 tax.
Partnerships generally must make installment payments of estimated
section 1446 tax if they expect the aggregate tax on the
effectively connected taxable income (ECTI) that is allocable to
all foreign partners to be $500 or more.
US Code:
26
USC 1446 Name of Law: Withholding Tax on Foreign Partners'
Share of Effectively Connected Income
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