Yes, he can file an amended return using Sprintax as a nonresident alien.
However, if your brother has a Permanent Resident Card (green card) or meets the substantial presence test, then he would not be a nonresident alien. To verify his status, see: Determining Alien Tax Status.
See: Can I file a 1040 or do I have to file a 1040-NR?
Please visit the TurboTax/Sprintax site for more info.
