Need help with DAX

Use the IF ( ) DAX function, along with logical AND ( && ) and IN ( ) operators. Start by writing out the conditions in your native speaking language, which it looks like you have done. Then replace various parts with DAX functions:

"

If settle name is equal to Card or OCCF &

code is equal to 000100160 &

Number len is 11 &

Number (Left 4) digits are 4398 &

Number (right 4) digits are 1614 &  

code is not blank

then return valid else error."

IF ( 'Table'[settle name] IN { "Card", "OCFF" } && 'Table'[code] = "000100160"... , "Valid", "Error" )

I leave it to you, original poster, to fill in the blanks.

Hi  InsightSeeker 

Would this help?

Column = 
IF(
    [settle_name] IN { "Card", "OCCF" }
        && [Code] = "000100160"
        && LEN( [Number] ) = 11
        && LEFT( [Number], 4 ) = "4398"
        && RIGHT( [Number], 4 ) = "1614"
        && [Code.1] <> BLANK(),
    "Valid",
    "Error"
)

InsightSeeker.pbix

(I added 2 more lines for testing.)