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Department of Taxation and FinanceInstructions for Form CT645CT645IRecapture of STARTUP NY Tax Benefits Tax Law Article 1, Sections 39 and 39aGeneral information SUN Three Areas to Revitalize and
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How to fill out form ct-645-i

01
To fill out Form CT-645-I, follow these steps:
02
Enter your business name and address in the designated fields.
03
Provide your federal employer identification number (EIN) and Connecticut tax registration number.
04
Indicate the taxable year you are filing for and check the appropriate box for the type of return you are filing.
05
Provide details of your business activities and the date your business was established.
06
Fill out Part I - Summary of Federal Income Tax Changes, including adjustments, if applicable.
07
Complete Part II - Composite Partnership Income Tax Calculation.
08
Fill out Part III - Schedule of Composite Income and Apportionment.
09
Attach any required schedules or supporting documents.
10
Sign and date the form.
11
Keep a copy for your records and submit the form to the Connecticut Department of Revenue Services.

Who needs form ct-645-i?

01
Form CT-645-I is required to be filled out by partnerships, limited liability companies, and S corporations that elect to file a Connecticut Composite Income Tax Return on behalf of their nonresident members.
02
Additionally, this form is needed if the partnership or S corporation has nonresident members who are subject to Connecticut personal income tax and choose to participate in the composite return.
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Form CT-645-I is the information return for non-resident beneficiaries.
Non-resident beneficiaries with income from New York State sources are required to file form CT-645-I.
Form CT-645-I must be filled out with the beneficiary's personal information, details of income from New York State sources, and any deductions or credits applicable.
The purpose of form CT-645-I is to report income earned from New York State sources by non-resident beneficiaries.
Information such as the beneficiary's name, address, tax identification number, details of income from New York State sources, deductions, and credits must be reported on form CT-645-I.
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