Valid Characters
Internal Revenue Manual Part 3. Submission Processing · 2026-10-03 edition · updated 2026-10-04 · United States
Do not enter other characters even if they appear on the form.
Specific Entry
Valid Characters
941 EIN
Numeric (0-9) or blank
Name Control
Alpha (A-Z)
Numeric (0-9)
Hyphen (-)
Ampersand (&)
Maximum 4 Characters
In Care of Name Line
Alpha (A-Z)
Numeric (0-9)
Hyphen (-)
Ampersand (&)
In Care Of (%)
Space
Blank
Maximum 35 Characters
Address Line
Alpha (A-Z)
Numeric (0-9)
Hyphen (-)
Slash (/)
Asterisk (*) only valid in the first position for PO Box
Space
Maximum 35 Characters
City Line
Alpha (A-Z)
Space
Maximum 22 Characters
State Line
Alpha (A-Z)
Maximum 2 Characters
ZIP Code
Numeric (0-9)
Maximum 9 Characters
Money (Data) Fields
Numeric (0-9)
Hyphen (-) Negative amounts
Maximum 15 Characters
Deposit State
Alpha (A-Z)
Maximum 2 Characters
Third-Party ID Number
Alpha (A-Z)
Numeric (0-9)
Maximum 5 Characters
Preparer’s PTIN
Alpha (P in first position only)
Numeric (0-9)
Maximum 9 Characters
Preparer’s EIN
Numeric (0-9)
Maximum 9 Numerics
Preparer’s Phone
Numeric (0-9)
Maximum 10 Numerics
Schedule B Money Fields
Numeric (0-9)
Hyphen (-) Negative amounts
Maximum 15 Characters
Schedule R - Employer EIN
Numeric (0-9)
Period (.)
Maximum 9 Characters
Schedule R - Clients EIN
Numeric (0-9)
Period (.)
Maximum 9 Characters
Schedule R - Number of Employees
Numeric (0-9)
Maximum 7 Characters
Schedule R - Money Fields
Numeric (0-9)
Hyphen (-) Negative amounts
Maximum 15 Characters
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