VBA code using if-elseif-statement

[Shantella]

Hi.
I'm struggling to get my VBA code to work. What it need to do is if the Annual salary inserted in the input box is equal or less than the values in cells B3 and C3 and the age inserted in the input box is less than the value of cell b13, a calculation must be done where the annual salary less the value in d3 times the percentage in e3 less the value in c12, which must be displayed in a message box reading tax liablity and the amount calculated.
Attached is my workbook and VBA.

I would really appreciate your help. I've been struggling with this for the whole day...

Kind regards.

 

[Shantella]

When I want to attach my picture it states that the file is to big... I don't know how to reduce it.

 

[kweaver]

Pictures aren't helpful to anyone trying to help you. Use XL2BB to illustrate a sample of your sheet and expected results.