changing value of one cell to another is zero

Hello, I need help with a formula. I attached the worksheet for our budget. Basically, I want to change the value of my income cell (I6) till my surplus(deficit) line is zero (I92). I92 has a formula for I6-i90 (income-expenses) so this is creating a circular reference. There are other cells that are based on % of I6 income which changes the amount numerous times (circular). Can anyone help?

What do you mean by

PHP Code: 

 want to change the value of my income cell 


Do you wan to change it manually or automatically by a formula?

Why not make I6 = I90?
Then I94 will be zero.

Maybe I didn't understand your question.

modytrane