"payment date" vs "payment due date"

[naeeim07]

If "payment due date" fall on friday till monday, "payment date"=next tuesday.
Otherwise payment date=next friday.

I have written this formula with 8 "if statement", but pls help me to simplify the formula since i would like to add more complicated formula to the same line

=if(k4="blm submit","blm submit",if(weekday(k4)=1,k4+2,if(weekday(k4)=2,k4+1,if(weekday(k4)=3,k4+3,if(weekday(k4)=4,k4+2,if(weekday(k4)=5,k4+1,if(weekday(k4)=6,k4+4,if(weekday(k4)=7,k4+3))))))))

see attachment for details. Also see sheet#2="payment day table"

[tim201110]

=if(k4="blm submit","blm submit",k4+choose(weekday(k4),2,1,3,2,1,4,3))

[naeeim07]

Tim201110,
tq very much, that is very excellent solution