Structure of IF+4 and hybridization of iodine in this structure are
sp3d, Irregular tetrahedral
Lets try to find out ep value and then geometry.
IF+4⇒ ep = (7+4−1)2 = 5[Trigonal Planar]
Ep = 5 ⇒sp3d hybridization
Because F is most electronegative, lone pair and F (equatorial plane) will repel each other.
If will make Irregular Tetrahedral.