if statement adjustment ( income tax calculation)

Hey People,

I am working on developing a worksheet that will calculate employee tax payable to the Revenue authority. The income tax relief in Kenya is Kes 1,162. The below formula works well, but I would like to add a final line to this formula that states. "If the income tax calculated by the below formula is less than or equal to Kes 1,162, the result should be a zero. Please help.
=IF(AND($I11<'Tax Table'!$A$4,$I11=0),0,IF(AND($I11>='Tax Table'!$A$4,$I11<='Tax Table'!$B$4),'Tax Table'!$C$4*Payroll!$I11,IF(AND($I11>='Tax Table'!$A$5,$I11<='Tax Table'!$B$5),'Tax Table'!$C$5*($I11-'Tax Table'!$G$4)+'Tax Table'!$E$4,IF(AND($I11>='Tax Table'!$A$6,$I11<='Tax Table'!$B$6),'Tax Table'!$C$6*($I11-'Tax Table'!$G$5)+'Tax Table'!$E$5,IF(AND($I11>='Tax Table'!$A$7,$I11<='Tax Table'!$B$7),'Tax Table'!$C$7*($I11-'Tax Table'!$G$6)+'Tax Table'!$E$6,IF(AND($I11>'Tax Table'!$A$8),'Tax Table'!$C$8*($I11-'Tax Table'!$G$7)+'Tax Table'!$E$7,"Something Wrong"))))))

Hey Mika,
my apologies, please find the workbook attached. I have indicated the relief which is Kes 1,162 on the 'tax table' tab.

Does this do what you want?

=LOOKUP(I11,{0,1000,1500,2000,3000,4000,5000,6000,7000,8000,9000,10000,11000,12000,13000,14000,15000},{0,30,40,60,80,100,120,140,160,180,200,220,240,260,280,300,320})

Windy