The surge applies to April, so the payouts you just received. You can check with the earnings calculator to see how much it should have been. The dashboard also shows some data, but at least for me it is currently missing the data from the stefan-benten satellite. The earnings calculator will show data for this satellite, but will be missing the surge payout info until the paystub data is reported back to your node. It looks like this for me now.
Note the missing surge line for the last satellite
Please double check your payouts and if you find there is still an issue, you can file a support ticket. https://support.storj.io/hc/en-us/requests/new
If you have questions about the calculator itself, you can ask me here as it is not an official tool.