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# I don't think the video training in any way has enabled this challenge to be tackled easily...

I've had a tremendously difficult time trying to complete this challenge have been in and out of the forum on all 4 steps in this 4 step test. Can someone please help me stumble through this last piece :(

struct.swift
```struct Expense {
var description: String
var amount: Double = 0.0

init (description: String) {
self.description = description
}

// add the calculateTaxes method here

func calculateTaxes(percentage: Double) -> Double {
return self.amount * (percentage/100)
}
}

var item = Expense(description: "My description")
```

Step 1:

```func calculateTaxes(percentage: Double) {

}
```

Step 2"

```func calculateTaxes(percentage: Double) -> Double {
return self.amount * (percentage/100)
}
```

Step 3:

```var item = Expense(description: "MacBook Pro (really cheap one)")
item.amount = 100
```

Step 4:

```var taxes = item.calculateTaxes(7.5)
```

Perhaps you forgot to assign 100 to the `amount` property?

Thanks Dom, my biggest challenge is understanding the questions properly and then trying not to OVERCOMPLICATE the answer... So I spent a long yesterday NOT actually changing the amount = 0.0 to 100 because it seemed too simple.

Oh well... learning slowly!

Is that the last step for the challenge or is there more steps?