New York Form IT-203-GR-ATT-C Schedule C is an attachment used with Form IT-203-GR when a partnership is filing a metropolitan commuter transportation mobility tax, also called MCTMT, group return for qualifying nonresident partners. The purpose of this schedule is to list each nonresident partner who is participating in the MCTMT group return and report that partner’s net earnings from self-employment allocated to the Metropolitan Commuter Transportation District, separated by Zone 1 and Zone 2. The schedule also helps calculate each partner’s MCTMT, estimated MCTMT payments or payments made with Form IT-370, balance due, overpayment, and other group return details. Page 1 collects the partnership’s identifying information, each partner’s name and address, Social Security number, MCTD Zone 1 earnings, MCTD Zone 2 earnings, and MCTMT amount. Page 2 continues the same partner rows by repeating the Social Security number and then reporting payments, balances, overpayments, and other group return information. This form is important because each partner’s information must stay in the same row across both pages. If the partnership has more partners than one schedule can hold, more Schedule C forms can be completed and submitted together with the main group return.
How To File New York Form IT-203-GR-ATT-C Schedule C
Complete Schedule C for nonresident partners who qualify and are participating in the MCTMT group return. Start by entering the partnership’s legal name and special New York State identification number at the top of both pages. Then list each partner in either alphabetical order or Social Security number order. Use the same order on page 1 and page 2 so every partner’s tax details match correctly.
If you need more space, complete as many Schedule C forms as needed. Submit all completed Schedule C forms with Form IT-203-GR. If you file more than one Schedule C, enter the combined grand totals from all Schedule C forms only on the last Schedule C. Leave the total boxes blank on the earlier copies. After the totals are completed, carry the required amounts to the proper line on Form IT-203-GR.
Enter negative amounts with a minus sign. Do not use brackets or vague marks for negative numbers. Check that each partner has one row, that the Social Security number on page 2 matches the same partner on page 1, and that the balance due or overpayment is calculated correctly.

How To Complete New York Form IT-203-GR-ATT-C Schedule C
Line 1: Legal Name Of Partnership: Enter the full legal name of the partnership. Use the same partnership name that appears on Form IT-203-GR.
Line 2: Special NYS Identification Number: Enter the partnership’s special New York State identification number. Make sure this number matches the number used on the main group return.
Line 3: Schedule C Purpose: Use this schedule for nonresident partners who qualify and are participating in an MCTMT group return. Do not use it for partners who are not included in the group filing.
Line 4: Partner Listing Order: List the partners in either alphabetical order or Social Security number order. Once you choose the order, keep it the same throughout the schedule.
Line 5: Negative Amount Rule: If any amount is negative, place a minus sign before the amount. This makes the negative entry clear and avoids confusion during review.
Line 6: Additional Schedule C Forms: If one Schedule C does not have enough space for all partners, prepare extra Schedule C forms. Each additional form should continue the same type of information for the remaining partners.
Line 7: Column A, Name And Address Of Nonresident Partner: Enter the name and address of each nonresident partner. Use one row for each partner, and do not combine more than one partner in the same row.
Line 8: Column B, Partner’s Social Security Number: Enter the partner’s Social Security number. The same number must also be entered in Column B2 on page 2 for the matching row.
Line 9: Column C, Net Earnings From Self-Employment Allocated To The MCTD Zone 1: Enter the partner’s net earnings from self-employment that are allocated to MCTD Zone 1. Use only the amount that belongs in Zone 1 for that partner.
Line 10: Column D, Net Earnings From Self-Employment Allocated To The MCTD Zone 2: Enter the partner’s net earnings from self-employment that are allocated to MCTD Zone 2. Keep this amount separate from the Zone 1 amount.
Line 11: Column E, MCTMT: Enter the MCTMT amount for the partner. This amount is based on the partner’s MCTD allocated earnings and the applicable calculation rules.
Line 12: Page 1 Partner Rows: Complete Columns A through E for every participating nonresident partner shown on page 1. Keep all amounts in the same row as the correct partner.
Line 13: Page 1 Totals: Add the totals for the columns that have total boxes. If this is the only Schedule C, enter the totals from this schedule. If multiple Schedule C forms are used, enter the grand totals only on the last Schedule C.
Line 14: Multiple Schedule C Total Rule: When more than one Schedule C is prepared, leave the total boxes blank on every earlier Schedule C. Only the final Schedule C should show the combined totals from all Schedule C forms.
Line 15: Submit All Schedule C Forms: Attach and submit every completed Schedule C with Form IT-203-GR. Do not submit only the last schedule if more than one was used.
Line 16: Enter Totals On Form IT-203-GR: Transfer the required total amounts from Schedule C to the appropriate line on Form IT-203-GR.
Line 17: Page 2 Legal Name Of Partnership: Enter the same legal name of the partnership that was entered on page 1.
Line 18: Page 2 Special NYS Identification Number: Enter the same special New York State identification number that was entered on page 1.
Line 19: Column B2, Partner’s Social Security Number: Copy the partner’s Social Security number from Column B on page 1. Make sure the number stays in the same row as the matching partner.
Line 20: Column F, Estimated MCTMT Paid Or Amount Paid With Form IT-370: Enter the estimated MCTMT paid for the partner, including any amount paid with Form IT-370. This amount is used to determine whether the partner still owes tax or has paid too much.
Line 21: Column G, Balance Due: Subtract Column F from Column E. If the MCTMT in Column E is more than the payment in Column F, enter the difference as the balance due.
Line 22: Column H, Overpayment: Subtract Column E from Column F. If the payment in Column F is more than the MCTMT in Column E, enter the difference as the overpayment.
Line 23: Column I, Other Group Returns: Complete this column if the partner has other group return information that must be reported. If it does not apply, leave the entry blank.
Line 24: Page 2 Partner Rows: Complete Columns B2 through I for the same partners listed on page 1. The first row on page 2 must match the first row on page 1, the second row must match the second row, and the same pattern should continue.
Line 25: Page 2 Totals: Add the amounts in the columns that include total boxes on page 2. If this is the only Schedule C, enter the totals from this schedule. If several Schedule C forms are used, enter the grand totals only on the last one.
Line 26: Balance Due And Overpayment Check: Do not enter the same amount as both a balance due and an overpayment for the same partner. If Column E is greater than Column F, use Column G. If Column F is greater than Column E, use Column H.
Line 27: Social Security Number Match Check: Review Column B on page 1 and Column B2 on page 2. Each partner’s Social Security number must match across both pages and remain in the correct row.
Line 28: MCTD Zone Check: Review Columns C and D to confirm that Zone 1 and Zone 2 earnings are entered separately. Do not combine both zones in one column.
Line 29: Final Review: Check the partnership name, identification number, partner names, addresses, Social Security numbers, MCTD earnings, MCTMT amount, payments, balance due, overpayment, and other group return entries before filing.
Line 30: Final Filing Step: Attach the completed Schedule C, or all completed Schedule C forms, to Form IT-203-GR and make sure the required totals are carried to the correct line on the main return.