Inputting Money spent

How do i add the expenses to my report if i already created an envelope? If i have a $100 for amazon how do i put i spent $80?

Once you create an Envelope, you need to fill it with money from your accounts. Once the money is in the envelope, just create a transaction for the Amazon purchase and it will decrease the amount of money left in the envelope. At the beginning of each budget cycle or when you receive money, be sure to fill your envelopes as much as you can so you can see how close you are to your spending plan.