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Department of Taxation and Finance

New York State Corporation tax Modernized e-File (MeF) Assurance Testing System (ATS) for tax year 2024

Note: We will email you a two-digit code to replace "XX" in the 6th and 7th digits of each Test EIN.

Use the spreadsheet Corp SWD Submissions to provide your test submission information.

Visit ATS Testing guidelines and additional information for testing requirements and guidance.

Corporation tax MeF ATS tests for tax year 2024
Test# Test Name Test EIN Main Form Associated Forms
1 CTEF5A 00219XX01 CT-5 N/A
2 CTEF5B 00219XX02 CT-5 N/A
3 CTEF5C 00219XX03 CT-5 N/A
4 CTEF54 00219XX04 CT-5.4 N/A
5 CTEF53 00219XX05 CT-5.3 N/A
6 CTEF51 00219XX06 CT-5.1 N/A
7 CTEF59 00219XX07 CT-5.9 N/A
8 CTEF59E 00219XX08 CT-5.9E N/A
9 CTEF56 00219XX09 CT-5.6 N/A
10A CTEF300A  00219XX10 CT-300  N/A
10B CTEF400B 00219XX10 CT-400 N/A
10C CTEF400C 00219XX10 CT-400 N/A
10D CTEF400D 00219XX10 CT-400 N/A
11 CTEF13 00219XX11 CT-13 N/A
12 CTEF33M 00219XX12 CT-33/33-M CT-33-R, CT-33.1, CT-399 
13 CTEF33C 00219XX13 CT-33-C N/A
14 CTEF33NL 00219XX14 CT-33-NL/33-M CT-238
15 CTEF3M222 00219XX15 CT-3/3-M CT-222, CT-3.4, CT-227
16 CTEF37 00219XX16 CT-3 CT-3.4, CT-37, CT-238, CT-604, CT-606
17 CTEF246 00219XX17 CT-3 CT-3.3, CT-3.4, CT-246, CT-248, CT-261, CT-642, CT-654, CT-660
18 CTEF44 00219XX18 CT-3 CT-3.1, CT-3.4, CT-CT-44, CT-46, CT-225, CT-227, CT-641, CT-648, CT-649, CT-650, CT-661, CT-661-ATT
19 CTEF601 00219XX19 CT-3 CT-3.4, CT-46, CT-225, CT-601, CT-603, CT-646, CT-658, CT-663, DTF-686
20 CTEF47 00219XX20 CT-3 CT-3.4, CT-47, CT-227, CT-501, CT-635, CT-638, CT-644, CT-645
21 CTEF43 00219XX21 CT-3 CT-3.2, CT-3.4, CT-43, CT-225, CT-602, CT-604-CP, CT-607, CT-611.1
22 CTEF604 00219XX22 CT-3 CT-3.1, CT-3.4, CT-224, CT-225, CT-604, CT-651, DTF-621
23 CTEF636 00219XX23 CT-3 CT-3.4, CT611.2, CT-636, CT-647
24 CTEF3S 00219XX24 CT-3-S

CT-34-SH, CT-60, CT-223, CT-225, CT-227, CT-241, CT-249, CT-250, CT-605, CT-611, CT-612, CT-613, CT-633, CT-634, CT-637, CT-640, CT-643, CT-644, CT-652, CT-655, CT-661, CT-661-ATT, CT-662, DTF-621, DTF-622
25 CTEF3S5253 00219XX25 CT-3-S

CT-34-SH, CT-60, CT-657
26 CTEF183M 00219XX26 CT-183/183-M

CT-249, CT-613
27 CTEF184M 00219XX27 CT-184/184-M

CT-611.1
28 CTEF186E 00219XX28 CT-186-E

CT-48, CT-249, CT-501, CT-631, CT663
29 CTEF3A 00219XX29 CT-3-A/3-M

CT-3.4, CT-60, CT-225-A, CT-225-A/B(2)(PDF), CT-227, CT-399(3)(PDF), CT-650(2)
30 CTEF3ABC1 00219XX30 CT-3-A/BC

N/A
31 CTEF3ABC2 00219XX31 CT-3-A/BC

N/A
32 CTEF33A 00219XX32 CT-33-A

CT-33A/ATT(3), CT-33-A/B, CT-33.2, CT-225-A, CT-225-A/B(PDF), DTF-686

Updated: