To edit, you can simply increase the budget amount by the amount you want to add. The remaining balance will be recalculated to include the amount added. You can also edit to decrease your budget amount, which will subtract the same amount from the existing balance.
For example, if the original budgeted amount was $1000 and the account is showing a remaining balance of $100, to add an additional $1000 edit the budget amount to $2000 and the remaining balance will go up to $1100.
Note that there is no way to reset the budget amount or remaining balance. If you'd like to start fresh with a new budget amount, rather than adding to your existing amount, we recommend creating a new budget tracker.