Sling Money is not able to provide tax advice. You should consult your own tax advisor to understand whether you have to report Sling Money transactions to your local tax authority and whether they may represent gains or losses on your taxes.
When you add money to Sling Money, you are swapping your currency for digital dollars (USDP) or digital euros (EURC). When you withdraw money from Sling Money, you are swapping it back. In some countries, this may be a reportable virtual currency transaction.