# Wisconsin Tax Account Number Check Digit Formula

for WT-6

**Wisconsin Tax Account Number Check Digit Calculation **

- Starting from the furthest most right position, multiply each digit by a weight pattern of 2, 1, 2, 1, 2.
- If the product is two digits, add the two digits together.
- Add all digits together.
- Take the sum and subtract from the next multiple of ten.
- The result is the check digit.
**Example: Wisconsin Tax Account Number 036-1029876543-04**-
4 X 2 = 8
- Since the product of 5 X 2 is two digits, add the two digits : 1 + 0 = 1
- 8 + 0 + 6 + 4 + 1 + 6 + 5 + 8 + 9 + 2 + 0 + 1 + 3 + 3 + 0 = 56
- 60 - 56 = 4
**4**is the check digit for Wisconsin tax account number 036-1029876543-04.

0 X 1 = 0

3 X 2 = 6

4 X 1 = 4

5 X 2 = 10 (1 + 0 = 1)

6 X 1 = 6

7 X 2 = 14 (1 + 4 = 5)

8 X 1 = 8

9 X 2 = 18 (1 + 8 = 9)

2 X 1 = 2

0 X 2 = 0

1 X 1 = 1

6 X 2 = 12 (1 + 2 = 3)

3 X 1 = 3

0 X 2 = 0

### FOR MORE INFORMATION PLEASE CONTACT:

WISCONSIN DEPARTMENT OF REVENUE

Tax Operations Bureau 3-14

2135 Rimrock Rd.

PO Box 8902

Madison, WI 53708-8902

Email: DORBusinessTax@revenue.wi.gov

Fax: (608) 264-6884

Page last updated December 18, 2013