There are a few possible reasons for this:
1. Your printer is not properly connected to your computer. Check that the printer is properly plugged in and that all cables are securely connected.
2. You may be using the wrong type of paper. Some types of paper are not compatible with inkjet printers and can cause smudging.
3. The ink cartridges in your printer may be old or empty. Try replacing the cartridges with new ones.
4. There may be something blocking the ink nozzle in your printer. Try cleaning the printer head with a cotton swab dipped in distilled water.