Month range for MFT-CD 13 with Reference Number 519, 565, 613, 643, 644, 648, 650, 655, 656, 657, 661, 665, 676, 677; 693, 694, 700-705, or 710 is 01 through 12.

MFT and Tax Class Chart

Internal Revenue Manual Part 3. Submission Processing · 2026-10-03 edition · updated 2026-10-04 · United States

BMF MFT/Tax Class Chart

BMF MFT

FORM

TAX CLASS

BMF MFT

FORM

TAX CLASS

01

941

1

46

8038

3

02

1120

3

46

8038-CP

3

03

720

4

46

8038-G

3

04

942

1

46

8038-GC

3

05

1041

2

46

8038-T

3

06

1065

2

46

8328

3

07

1066

3

47

8871

4

08

8804

1

49

8872

4

08

8813

1

50

4720

4

09

CT-1

7

51

709

5

10

940

8

52

706

5

11

943

1

58

4638

4

12

1042

1

60

2290

4

13

8278

3

61

11

4

14

944

1

62

11-B

4

15

8752

2

63

11-C

4

16

945

1

64

730

4

17

8288

1

67

990

4

33

990C

3

74

5500

4

34

990T

3

75

8955-SSA

4

35

2

76

5330

4

36

1041A

4

77

706-GS(T)

5

37

5227

4

78

706-GS(D)

5

40

8849

4

83

2

43

8849

4

85

8038-B

3

43

4

86

8038-TC

3

44

990PF

4

IMF MFT/Tax Class Chart

IMF MFT

FORM

TAX CLASS

IRMF MFT

FORM

TAX CLASS

30/31

1040

2

29

5329

0

30/31

1040-A

2

30/31

1040-NR

2

30/31

1040-SS

2

30/31

1040-PR

2

30/31

1040-ES

2

30/31

1040-EZ

2

30/31

8278

2

35/65

2

55

8278 (IMF)

2

65

2

82

2

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▸Contents — Internal Revenue Manual Part 3. Submission Processing

Internal Revenue Manual Part 3. Submission Processing

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