Petty cash hell

Hi,
I am trying to get my spread sheet to work out tax only if it is deductable. So one column is titled gross, one is titled net and one is titled tax. I want to be able to type in the gross cost in the gross column, if i pay tax on the item i want to put a "Y" in the tax column (Yes tax has been paid) and then the net ammount would be automatically calculated and put in the net column. If I put a "n" in it (No tax has not been paid) then the net column stays the same as the gross amount.

Can you help?

Something like

=IF(B2="N",A2,A2*10)

Change *10 to your tax amount

The reverse would be

=IF(B2="y",A2*10,A2)

VBA Noob

Thank you so much for that - It not only worked, but also stopped me from throwing the laptop across the room!! You are a star.