Nasa boss says he hopes astronauts may one day return his rover. The director of Nasa's Mars exploration programme says he hopes that one day the rover Curiosity might be brought back to Earth by astronauts. Doug McCuistion said it was his personal hope that humans would visit the Red Planet in the 2030s or 2040s. He said he could imagine astronauts walking up to Curiosity.
If you mean personal income taxes, you can file them any time after January 1, and they are due on or before April 15, unless you file for an extension. In USA, you may file personal income taxes beginning January 2 and the deadline is April 15 or the first business day thereafter.
The IRS released the minimum income to file taxes in 2015. For the 2015 tax year, you will need to file taxes if your gross income meets the minimum income for your filing status and age. Here are the minimum income limits for the 2015 tax year. This table does not apply to dependents.