If function negative numbers

I have an if function statement that returns multiple possible results in column I from a formula in column H. The formula works unless the result in column H is a negative number, e.g., -4, then I get a 0 in Column I instead of the expected 5. How can I get my If statement to calculate the negative number?

Column H
=IF(H8="N/A",0,IF(H8="Perpetual",0,IF(H8<=1,5,IF(H8=2,3,IF(H8>=3,0,"")))))

Column I
=IF(H8="N/A",0,IF(H8="Unknown",5,IF(H8<=1,5,IF(H8=2,3,IF(H8>=3,0,"")))))

If you're getting 0 from that formula, it means H8 is NOT a numerical value of -4, it's just a text string.

Is H8 the result of another formula? What's that formula?

Many apologies, Column H formula is =IF(G8="N/A","N/A",IF(G8="Perpetual","Perpetual",IF(G8>=TODAY(),DATEDIF(TODAY(),G8,"Y"),"-"&DATEDIF(G8,TODAY(),"Y")))). I copied over the wrong formula.

Yep, this is the part that is generating the negative number

"-"&DATEDIF(G8,TODAY(),"Y")

The & symbol is shorthand for Concatenate, which combines 2 text strings into 1 string.
So it's result therefor is a text string, not a number.

Try changing that to
-DATEDIF(G8,TODAY(),"Y")

That works perfectly! Thank you so much!

You're welcome.