Yes, you can use TurboTax to file your US tax return if you are a US resident and worked in Belgium..
TurboTax supports filing for foreign income and can help you claim the Foreign Earned Income Exclusion or Foreign Tax Credit to avoid double taxation
To set up a TurboTax account go to TurboTax.com and click here for instructions to claim the foreign tax credit.
For more details, you can refer to the TurboTax guidelines and the IRS guidelines